#151C16
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.016 149), rgb(21, 28, 22).
Aa
White text reads best on this color (17.36:1).
About this color
#151C16 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.36:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.36:1 |
Values
| HEX | #151C16 |
| RGB | rgb(21, 28, 22) |
| HSL | hsl(129, 14%, 10%) |
| OKLCH | oklch(21.7% 0.016 149) |
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 #151C16 | 17.36:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #151C16 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #151C16 text on white | 17.36:1 | AAA | Lc 104.2 | Preferred for body text |
| #151C16 text on black | 1.20:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D5DBD5
oklch(88.5% 0.01 145.5)
-
Step 300
300
#B9C4BA
oklch(80.9% 0.018 148.1)
-
Step 400
400
#94A697
oklch(70.7% 0.03 150.2)
-
Step 500
500
#7A907D
oklch(63% 0.038 149)
-
Step 600
600
#637A66
oklch(55.5% 0.041 148.6)
-
Step 700
700
#526755
oklch(49.1% 0.038 149)
-
Step 800
800
#435446
oklch(42.7% 0.031 150.1)
-
Step 900
900
#39453B
oklch(37.6% 0.023 150)
-
Step 950
950 (this color)
#151C16
oklch(21.7% 0.016 149)
#151C16 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) | #1C1B16 | 0.013 |
| Deuteranopia (no green cones) | #1B1A16 | 0.013 |
| Tritanopia (no blue cones) | #141C1A | 0.008 |
| Achromatopsia (no color) | #1A1A1A | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151C16
#151C16
oklch(21.7% 0.016 149)
- #1E171D
#1E171D
oklch(21.6% 0.016 330.9)
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 #151C16, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Jet #212529 ΔE 0.049
- Dark #1B2431 ΔE 0.054
- Rich Navy #001219 ΔE 0.057
- Almost Black #070D0D ΔE 0.066
- Dark Brown #341C02 ΔE 0.066
- Oxford Blue #1B263B ΔE 0.073
- Dark Forest Green #002D04 ΔE 0.079
Use #151C16 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.