Luminance
0.009
Category
Black
Type
Dark
Best On
Color Codes
All color formats for your project
HEX
#181717181717RGB
rgb(24, 23, 23)R:24 G:23 B:23HSL
hsl(0, 2%, 9%)H:0° S:2% L:9%HSV / HSB
hsv(0, 4%, 9%)H:0° S:4% V:9%CMYK
cmyk(0%, 4%, 4%, 91%)C:0 M:4 Y:4 K:91LAB
lab(8, 0, 0)L:8 a:0 b:0OKLCH
oklch(20.6% 0.002 17.3)L:20.6% C:0.002 H:17.3°Code Formats
color: #181717;UIColor(red: 0.094, green: 0.090, blue: 0.090, alpha: 1.0)Color(0xFF181717)Color(0xFF181717)#FF181717Contrast Analysis
WCAG compliance with grayscale colors
On White
17.89:1
On Black
1.17:1
Grayscale Contrast
0%
1.2
Fail10%
1.0
Fail20%
1.4
Fail30%
2.1
Fail40%
3.1
AA-large50%
4.5
AA-large60%
6.3
AA70%
8.5
AAA80%
11.1
AAA90%
14.2
AAA100%
17.9
AAABest Grayscale Contrast
#FFFFFF with ratio 17.89:1
Color Harmonies
Harmonious color combinations
complementary
Two colors opposite on the color wheel (180°)
split-complementary
Base color + two colors adjacent to its complement
triadic
Three colors evenly spaced (120° apart)
tetradic
Four colors evenly spaced (90° apart)
analogous
Three colors adjacent on the color wheel (30° apart)
Color Variations
Tints, shades, tones, and full scale
Color Scale (50-900)
50
100
200
300
400
500
600
700
800
900
Tints (Lighter)
Shades (Darker)
Tones (Desaturated)
Gradients (OKLCH)
Primary
90°linear-gradient(90deg, #4B4848 0%, #413E3E 100%)linear-gradient(90deg, oklch(40.5% 0.004 17.3) 0%, oklch(36.7% 0.004 17.3) 100%)Vibrant
135°linear-gradient(135deg, #392828 0%, #824A4A 100%)linear-gradient(135deg, oklch(29.7% 0.026 18.7) 0%, oklch(47.5% 0.076 20.3) 100%)Complementary
90°linear-gradient(90deg, #181717 0%, #161717 100%)linear-gradient(90deg, oklch(20.6% 0.002 17.3) 0%, oklch(20.4% 0.002 197.0) 100%)Analogous
90°linear-gradient(90deg, #171617 0%, #181717 50%, #171716 100%)linear-gradient(90deg, oklch(20.2% 0.003 325.7) 0%, oklch(20.6% 0.002 17.3) 50%, oklch(20.4% 0.002 106.6) 100%)Sunset
90°linear-gradient(90deg, #F6CE55 0%, #EE6C2B 50%, #E6193C 100%)linear-gradient(90deg, oklch(86.4% 0.144 90.6) 0%, oklch(68.0% 0.177 43.8) 50%, oklch(59.1% 0.228 21.2) 100%)Ocean
135°linear-gradient(135deg, #19A1E6 0%, #22C3B6 50%, #47D1A3 100%)linear-gradient(135deg, oklch(67.5% 0.146 238.9) 0%, oklch(73.8% 0.124 186.2) 50%, oklch(77.5% 0.136 166.9) 100%)Dark Mode
180°linear-gradient(180deg, #171616 0%, #251818 100%)linear-gradient(180deg, oklch(20.1% 0.002 17.3) 0%, oklch(22.6% 0.021 18.8) 100%)Radial Glow
Radialradial-gradient(circle, #3E3C3C 0%, #4E4B4B 100%)radial-gradient(circle, oklch(35.8% 0.003 17.3) 0%, oklch(41.6% 0.004 17.3) 100%)💡 About OKLCH Gradients
OKLCH (Oklch Color Space) provides perceptually uniform gradients with better color transitions than traditional RGB/HSL gradients. The format is oklch(L% C H) where L = Lightness (0-100%), C = Chroma (0-0.4), H = Hue (0-360°).
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