#151F35
Closest named color: Dark (#1B2431). oklch(24.2% 0.045 264.7), rgb(21, 31, 53).
Aa
White text reads best on this color (16.41:1).
About this color
#151F35 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.045 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.024 away. White text reads best on it, at 16.41:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.41:1 |
Values
| HEX | #151F35 |
| RGB | rgb(21, 31, 53) |
| HSL | hsl(221, 43%, 15%) |
| OKLCH | oklch(24.2% 0.045 264.7) |
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 #151F35 | 16.41:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #151F35 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #151F35 text on white | 16.41:1 | AAA | Lc 103.3 | Preferred for body text |
| #151F35 text on black | 1.27:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#86A0D6
oklch(70.6% 0.085 264.4)
-
Step 500
500
#6988CB
oklch(63.2% 0.108 264.6)
-
Step 600
600
#5170B8
oklch(55.5% 0.118 265.2)
-
Step 700
700
#415E9F
oklch(49.1% 0.11 264.6)
-
Step 800
800
#364D81
oklch(42.8% 0.091 264.8)
-
Step 900
900
#2F4067
oklch(37.6% 0.071 265.3)
-
Step 950
950 (this color)
#151F35
oklch(24.2% 0.045 264.7)
#151F35 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) | #162136 | 0.007 |
| Deuteranopia (no green cones) | #131E35 | 0.005 |
| Tritanopia (no blue cones) | #072427 | 0.041 |
| Achromatopsia (no color) | #1F1F1F | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F35
#151F35
oklch(24.2% 0.045 264.7)
- #291E03
#291E03
oklch(24.2% 0.045 86.8)
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 #151F35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.024
- Oxford Blue #1B263B ΔE 0.027
- Rich Black #0D1B2A ΔE 0.028
- Jet #212529 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.064
- Navy Blue #001146 ΔE 0.066
- Gunmetal #293241 ΔE 0.075
- Rich Navy #001219 ΔE 0.079
Use #151F35 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.