#152131
Closest named color: Dark (#1B2431). oklch(24.5% 0.035 255.9), rgb(21, 33, 49).
Aa
White text reads best on this color (16.23:1).
About this color
#152131 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.035 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.015 away. White text reads best on it, at 16.23:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.23:1 |
Values
| HEX | #152131 |
| RGB | rgb(21, 33, 49) |
| HSL | hsl(214, 40%, 14%) |
| OKLCH | oklch(24.5% 0.035 255.9) |
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 #152131 | 16.23:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #152131 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #152131 text on white | 16.23:1 | AAA | Lc 103.1 | Preferred for body text |
| #152131 text on black | 1.29:1 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE9
oklch(88.5% 0.024 256.1)
-
Step 300
300
#AFC2DC
oklch(80.8% 0.042 256.3)
-
Step 400
400
#85A3CA
oklch(70.7% 0.066 255.2)
-
Step 500
500
#678CBD
oklch(63.2% 0.085 255.7)
-
Step 600
600
#4E75A9
oklch(55.6% 0.093 256)
-
Step 700
700
#3F6291
oklch(49.1% 0.086 256.1)
-
Step 800
800
#345075
oklch(42.6% 0.071 255.8)
-
Step 900
900
#2D435F
oklch(37.8% 0.056 254.9)
-
Step 950
950 (this color)
#152131
oklch(24.5% 0.035 255.9)
#152131 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) | #1B2232 | 0.011 |
| Deuteranopia (no green cones) | #171F31 | 0.007 |
| Tritanopia (no blue cones) | #092527 | 0.031 |
| Achromatopsia (no color) | #202020 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #152131
#152131
oklch(24.5% 0.035 255.9)
- #2A1E0C
#2A1E0C
oklch(24.5% 0.035 76)
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 #152131, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.015
- Oxford Blue #1B263B ΔE 0.026
- Rich Black #0D1B2A ΔE 0.027
- Jet #212529 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.062
- Gunmetal #293241 ΔE 0.071
- Navy Blue #001146 ΔE 0.076
- Rich Navy #001219 ΔE 0.078
Use #152131 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.