#151F2C
Closest named color: Rich Black (#0D1B2A). oklch(23.6% 0.029 255.3), rgb(21, 31, 44).
Aa
White text reads best on this color (16.61:1).
About this color
#151F2C is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.029. 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 16.61:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.61:1 |
Values
| HEX | #151F2C |
| RGB | rgb(21, 31, 44) |
| HSL | hsl(214, 35%, 13%) |
| OKLCH | oklch(23.6% 0.029 255.3) |
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 #151F2C | 16.61:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #151F2C | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #151F2C text on white | 16.61:1 | AAA | Lc 103.5 | Preferred for body text |
| #151F2C 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D7
oklch(80.9% 0.035 255.2)
-
Step 400
400
#8AA3C3
oklch(70.8% 0.055 254.7)
-
Step 500
500
#6D8CB4
oklch(63.2% 0.07 255)
-
Step 600
600
#5575A0
oklch(55.6% 0.077 256)
-
Step 700
700
#456289
oklch(49.1% 0.072 256.1)
-
Step 800
800
#39506F
oklch(42.6% 0.059 256.1)
-
Step 900
900
#31435A
oklch(37.8% 0.046 254.9)
-
Step 950
950 (this color)
#151F2C
oklch(23.6% 0.029 255.3)
#151F2C 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) | #1A202D | 0.009 |
| Deuteranopia (no green cones) | #171D2C | 0.007 |
| Tritanopia (no blue cones) | #0D2223 | 0.026 |
| Achromatopsia (no color) | #1E1E1E | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F2C
#151F2C
oklch(23.6% 0.029 255.3)
- #261C0E
#261C0E
oklch(23.5% 0.029 74.9)
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 #151F2C, 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 0.022
- Jet #212529 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.036
- Rich Navy #001219 ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.071
- Navy Blue #001146 ΔE 0.078
- Gunmetal #293241 ΔE 0.079
Use #151F2C 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.