#151F2A
Closest named color: Rich Black (#0D1B2A). oklch(23.5% 0.026 251.3), rgb(21, 31, 42).
Aa
White text reads best on this color (16.64:1).
About this color
#151F2A is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.026. 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 16.64:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.64:1 |
Values
| HEX | #151F2A |
| RGB | rgb(21, 31, 42) |
| HSL | hsl(211, 33%, 12%) |
| OKLCH | oklch(23.5% 0.026 251.3) |
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 #151F2A | 16.64:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #151F2A | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #151F2A text on white | 16.64:1 | AAA | Lc 103.6 | Preferred for body text |
| #151F2A text on black | 1.26:1 | 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
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B3C2D4
oklch(80.8% 0.03 253)
-
Step 400
400
#8BA3BF
oklch(70.7% 0.049 252.5)
-
Step 500
500
#6E8CAF
oklch(63% 0.063 252.6)
-
Step 600
600
#55769A
oklch(55.5% 0.068 251.2)
-
Step 700
700
#466384
oklch(49.1% 0.063 252.3)
-
Step 800
800
#39516B
oklch(42.7% 0.053 251.1)
-
Step 900
900
#314357
oklch(37.6% 0.041 251.6)
-
Step 950
950 (this color)
#151F2A
oklch(23.5% 0.026 251.3)
#151F2A 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) | #1B1F2B | 0.010 |
| Deuteranopia (no green cones) | #181D2A | 0.008 |
| Tritanopia (no blue cones) | #0E2123 | 0.020 |
| Achromatopsia (no color) | #1E1E1E | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F2A
#151F2A
oklch(23.5% 0.026 251.3)
- #261C10
#261C10
oklch(23.5% 0.026 71.1)
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 #151F2A, 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 0.023
- Jet #212529 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.038
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.073
- Gunmetal #293241 ΔE 0.080
- Navy Blue #001146 ΔE 0.081
Use #151F2A 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.