#151F29
Closest named color: Rich Black (#0D1B2A). oklch(23.5% 0.024 248.9), rgb(21, 31, 41).
Aa
White text reads best on this color (16.66:1).
About this color
#151F29 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 16.66:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.66:1 |
Values
| HEX | #151F29 |
| RGB | rgb(21, 31, 41) |
| HSL | hsl(210, 32%, 12%) |
| OKLCH | oklch(23.5% 0.024 248.9) |
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 #151F29 | 16.66:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #151F29 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #151F29 text on white | 16.66:1 | AAA | Lc 103.6 | Preferred for body text |
| #151F29 text on black | 1.25:1 | 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
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE3
oklch(88.4% 0.016 248)
-
Step 300
300
#B3C3D3
oklch(81% 0.029 248.2)
-
Step 400
400
#8BA4BC
oklch(70.8% 0.045 247.4)
-
Step 500
500
#6E8DAC
oklch(63.1% 0.059 248.8)
-
Step 600
600
#567797
oklch(55.7% 0.063 248.2)
-
Step 700
700
#466481
oklch(49.2% 0.059 248.3)
-
Step 800
800
#3A5169
oklch(42.6% 0.049 250.1)
-
Step 900
900
#324355
oklch(37.6% 0.038 250.3)
-
Step 950
950 (this color)
#151F29
oklch(23.5% 0.024 248.9)
#151F29 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) | #1B1F29 | 0.010 |
| Deuteranopia (no green cones) | #191D29 | 0.009 |
| Tritanopia (no blue cones) | #0E2122 | 0.020 |
| Achromatopsia (no color) | #1E1E1E | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F29
#151F29
oklch(23.5% 0.024 248.9)
- #261C11
#261C11
oklch(23.5% 0.025 68.8)
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 #151F29, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Dark #1B2431 ΔE 0.024
- Jet #212529 ΔE 0.031
- Oxford Blue #1B263B ΔE 0.040
- Rich Navy #001219 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.073
- Dark Brown #341C02 ΔE 0.080
- Gunmetal #293241 ΔE 0.081
Use #151F29 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.