#151D35
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.048 268.6), rgb(21, 29, 53).
Aa
White text reads best on this color (16.67:1).
About this color
#151D35 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.048 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 16.67:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.67:1 |
Values
| HEX | #151D35 |
| RGB | rgb(21, 29, 53) |
| HSL | hsl(225, 43%, 15%) |
| OKLCH | oklch(23.7% 0.048 268.6) |
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 #151D35 | 16.67:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #151D35 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #151D35 text on white | 16.67:1 | AAA | Lc 103.6 | Preferred for body text |
| #151D35 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
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E6
oklch(80.9% 0.056 268.2)
-
Step 400
400
#899FDA
oklch(70.8% 0.09 268.3)
-
Step 500
500
#6C86D0
oklch(63.2% 0.116 268.3)
-
Step 600
600
#556EBD
oklch(55.6% 0.126 268.8)
-
Step 700
700
#455CA3
oklch(49.2% 0.117 268.4)
-
Step 800
800
#394B84
oklch(42.7% 0.097 268.8)
-
Step 900
900
#313F6A
oklch(37.7% 0.076 268.9)
-
Step 950
950 (this color)
#151D35
oklch(23.7% 0.048 268.6)
#151D35 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) | #141F36 | 0.007 |
| Deuteranopia (no green cones) | #101D34 | 0.008 |
| Tritanopia (no blue cones) | #072226 | 0.042 |
| Achromatopsia (no color) | #1E1E1E | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151D35
#151D35
oklch(23.7% 0.048 268.6)
- #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 #151D35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Dark #1B2431 ΔE 0.030
- Oxford Blue #1B263B ΔE 0.033
- Jet #212529 ΔE 0.047
- Navy Blue #001146 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.070
- Rich Navy #001219 ΔE 0.076
- Dark Indigo #1F0954 ΔE 0.077
Use #151D35 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.