#102129
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.027 229.7), rgb(16, 33, 41).
Aa
White text reads best on this color (16.51:1).
About this color
#102129 is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 16.51:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #102129 |
| RGB | rgb(16, 33, 41) |
| HSL | hsl(199, 44%, 11%) |
| OKLCH | oklch(23.7% 0.027 229.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #102129 | 16.51:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #102129 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #102129 text on white | 16.51:1 | AAA | Lc 103.4 | Preferred for body text |
| #102129 text on black | 1.27:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE3
oklch(88.6% 0.018 229)
-
Step 300
300
#ACC5D2
oklch(80.9% 0.033 230.4)
-
Step 400
400
#7FA7BB
oklch(70.6% 0.052 230)
-
Step 500
500
#5E91AA
oklch(63% 0.066 230.4)
-
Step 600
600
#427B95
oklch(55.5% 0.072 229.6)
-
Step 700
700
#34687F
oklch(49.1% 0.067 229.1)
-
Step 800
800
#2C5568
oklch(42.8% 0.056 230)
-
Step 900
900
#284654
oklch(37.7% 0.043 229.5)
-
Step 950
950 (this color)
#102129
oklch(23.7% 0.027 229.7)
#102129 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1D2029 | 0.020 |
| Deuteranopia (no green cones) | #191E29 | 0.016 |
| Tritanopia (no blue cones) | #052324 | 0.019 |
| Achromatopsia (no color) | #1F1F1F | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102129
#102129
oklch(23.7% 0.027 229.7)
- #291B13
#291B13
oklch(23.7% 0.027 50.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #102129, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Dark #1B2431 ΔE 0.025
- Jet #212529 ΔE 0.031
- Oxford Blue #1B263B ΔE 0.041
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.074
- Gunmetal #293241 ΔE 0.080
- Dark Brown #341C02 ΔE 0.083
Use #102129 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.