#151D34
Closest named color: Rich Black (#0D1B2A). oklch(23.6% 0.046 268.2), rgb(21, 29, 52).
Aa
White text reads best on this color (16.70:1).
About this color
#151D34 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.046 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 16.70:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.70:1 |
Values
| HEX | #151D34 |
| RGB | rgb(21, 29, 52) |
| HSL | hsl(225, 42%, 14%) |
| OKLCH | oklch(23.6% 0.046 268.2) |
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 #151D34 | 16.70:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #151D34 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #151D34 text on white | 16.70:1 | AAA | Lc 103.6 | Preferred for body text |
| #151D34 text on black | 1.25:1 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B2C0E5
oklch(80.9% 0.055 268.9)
-
Step 400
400
#899FD8
oklch(70.7% 0.088 267.9)
-
Step 500
500
#6D86CD
oklch(63.1% 0.111 268.4)
-
Step 600
600
#556FBA
oklch(55.7% 0.121 267.9)
-
Step 700
700
#465CA0
oklch(49.1% 0.112 268.5)
-
Step 800
800
#394C82
oklch(42.8% 0.093 267.8)
-
Step 900
900
#313F68
oklch(37.6% 0.073 268.5)
-
Step 950
950 (this color)
#151D34
oklch(23.6% 0.046 268.2)
#151D34 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) | #141F35 | 0.007 |
| Deuteranopia (no green cones) | #111D33 | 0.006 |
| Tritanopia (no blue cones) | #082226 | 0.040 |
| Achromatopsia (no color) | #1E1E1E | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151D34
#151D34
oklch(23.6% 0.046 268.2)
- #271D01
#271D01
oklch(23.6% 0.047 89.8)
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 #151D34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Dark #1B2431 ΔE 0.029
- Oxford Blue #1B263B ΔE 0.034
- Jet #212529 ΔE 0.046
- Navy Blue #001146 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.070
- Rich Navy #001219 ΔE 0.074
- Dark Indigo #1F0954 ΔE 0.079
Use #151D34 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.