#151A2F
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.042 272.5), rgb(21, 26, 47).
Aa
White text reads best on this color (17.20:1).
About this color
#151A2F is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.042 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.017 away. White text reads best on it, at 17.20:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.20:1 |
Values
| HEX | #151A2F |
| RGB | rgb(21, 26, 47) |
| HSL | hsl(228, 38%, 13%) |
| OKLCH | oklch(22.4% 0.042 272.5) |
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 #151A2F | 17.20:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #151A2F | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #151A2F text on white | 17.20:1 | AAA | Lc 104.0 | Preferred for body text |
| #151A2F text on black | 1.22:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8EC
oklch(88.4% 0.028 274.6)
-
Step 300
300
#B5BFE1
oklch(80.8% 0.049 272.4)
-
Step 400
400
#909ED2
oklch(70.7% 0.078 272.6)
-
Step 500
500
#7585C7
oklch(63.1% 0.101 272.8)
-
Step 600
600
#5E6EB3
oklch(55.6% 0.109 272.5)
-
Step 700
700
#4D5C9A
oklch(49.2% 0.101 272)
-
Step 800
800
#3F4B7D
oklch(42.7% 0.084 272.2)
-
Step 900
900
#363F65
oklch(37.8% 0.066 272.7)
-
Step 950
950 (this color)
#151A2F
oklch(22.4% 0.042 272.5)
#151A2F 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) | #121C30 | 0.008 |
| Deuteranopia (no green cones) | #101A2F | 0.008 |
| Tritanopia (no blue cones) | #0C1E22 | 0.036 |
| Achromatopsia (no color) | #1B1B1B | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151A2F
#151A2F
oklch(22.4% 0.042 272.5)
- #221B03
#221B03
oklch(22.4% 0.041 93.6)
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 #151A2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.017
- Dark #1B2431 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.045
- Jet #212529 ΔE 0.050
- Navy Blue #001146 ΔE 0.063
- Rich Navy #001219 ΔE 0.064
- Midnight Purple #280137 ΔE 0.076
- Very Dark Purple #2A0134 ΔE 0.077
Use #151A2F 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.