#151D36
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.05 269), rgb(21, 29, 54).
Aa
White text reads best on this color (16.65:1).
About this color
#151D36 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.050 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 16.65:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.65:1 |
Values
| HEX | #151D36 |
| RGB | rgb(21, 29, 54) |
| HSL | hsl(225, 44%, 15%) |
| OKLCH | oklch(23.7% 0.05 269) |
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 #151D36 | 16.65:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #151D36 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #151D36 text on white | 16.65:1 | AAA | Lc 103.5 | Preferred for body text |
| #151D36 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E8
oklch(81% 0.059 268.9)
-
Step 400
400
#889EDC
oklch(70.6% 0.095 268.9)
-
Step 500
500
#6C85D2
oklch(63.1% 0.12 269.2)
-
Step 600
600
#546DBF
oklch(55.5% 0.131 269.1)
-
Step 700
700
#455BA5
oklch(49.1% 0.121 269.1)
-
Step 800
800
#394B86
oklch(42.8% 0.1 269.1)
-
Step 900
900
#313F6B
oklch(37.8% 0.078 269.1)
-
Step 950
950 (this color)
#151D36
oklch(23.7% 0.05 269)
#151D36 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) | #132037 | 0.010 |
| Deuteranopia (no green cones) | #0F1D35 | 0.009 |
| Tritanopia (no blue cones) | #062226 | 0.045 |
| Achromatopsia (no color) | #1E1E1E | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151D36
#151D36
oklch(23.7% 0.05 269)
- #281D00
#281D00
oklch(23.8% 0.049 88.6)
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 #151D36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Dark #1B2431 ΔE 0.031
- Oxford Blue #1B263B ΔE 0.033
- Jet #212529 ΔE 0.048
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.069
- Dark Indigo #1F0954 ΔE 0.076
- Rich Navy #001219 ΔE 0.077
Use #151D36 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.