#151F2E
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.032 258.3), rgb(21, 31, 46).
Aa
White text reads best on this color (16.57:1).
About this color
#151F2E is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.032 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 16.57:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.57:1 |
Values
| HEX | #151F2E |
| RGB | rgb(21, 31, 46) |
| HSL | hsl(216, 37%, 13%) |
| OKLCH | oklch(23.7% 0.032 258.3) |
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 #151F2E | 16.57:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #151F2E | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #151F2E text on white | 16.57:1 | AAA | Lc 103.5 | Preferred for body text |
| #151F2E 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
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B2C2DA
oklch(81% 0.038 258.4)
-
Step 400
400
#89A2C7
oklch(70.6% 0.061 258.1)
-
Step 500
500
#6C8BB9
oklch(63.1% 0.078 258.1)
-
Step 600
600
#5474A5
oklch(55.5% 0.085 258.7)
-
Step 700
700
#44618E
oklch(49% 0.081 258.9)
-
Step 800
800
#385073
oklch(42.8% 0.066 257.7)
-
Step 900
900
#31425D
oklch(37.7% 0.052 259.4)
-
Step 950
950 (this color)
#151F2E
oklch(23.7% 0.032 258.3)
#151F2E 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) | #19202F | 0.008 |
| Deuteranopia (no green cones) | #171D2E | 0.007 |
| Tritanopia (no blue cones) | #0B2224 | 0.029 |
| Achromatopsia (no color) | #1F1F1F | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F2E
#151F2E
oklch(23.7% 0.032 258.3)
- #271D0C
#271D0C
oklch(23.8% 0.033 79.5)
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 #151F2E, 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 0.021
- Oxford Blue #1B263B ΔE 0.033
- Jet #212529 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.069
- Rich Navy #001219 ΔE 0.071
- Navy Blue #001146 ΔE 0.075
- Gunmetal #293241 ΔE 0.078
Use #151F2E 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.