#151F36
Closest named color: Dark (#1B2431). oklch(24.3% 0.047 265.3), rgb(21, 31, 54).
Aa
White text reads best on this color (16.39:1).
About this color
#151F36 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.047 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.025 away. White text reads best on it, at 16.39:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.28:1 |
| White text | 16.39:1 |
Values
| HEX | #151F36 |
| RGB | rgb(21, 31, 54) |
| HSL | hsl(222, 44%, 15%) |
| OKLCH | oklch(24.3% 0.047 265.3) |
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 #151F36 | 16.39:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #151F36 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #151F36 text on white | 16.39:1 | AAA | Lc 103.3 | Preferred for body text |
| #151F36 text on black | 1.28:1 | 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
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#B0C1E5
oklch(81% 0.054 265.2)
-
Step 400
400
#86A0D8
oklch(70.7% 0.088 265)
-
Step 500
500
#6887CE
oklch(63.1% 0.113 265.4)
-
Step 600
600
#5070BB
oklch(55.6% 0.123 265.2)
-
Step 700
700
#415DA1
oklch(49% 0.114 265.5)
-
Step 800
800
#364C82
oklch(42.6% 0.094 265.8)
-
Step 900
900
#2E4069
oklch(37.7% 0.074 265.1)
-
Step 950
950 (this color)
#151F36
oklch(24.3% 0.047 265.3)
#151F36 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) | #162137 | 0.007 |
| Deuteranopia (no green cones) | #121E35 | 0.006 |
| Tritanopia (no blue cones) | #062427 | 0.043 |
| Achromatopsia (no color) | #1F1F1F | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F36
#151F36
oklch(24.3% 0.047 265.3)
- #2A1E02
#2A1E02
oklch(24.3% 0.047 85.6)
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 #151F36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.025
- Oxford Blue #1B263B ΔE 0.027
- Rich Black #0D1B2A ΔE 0.029
- Jet #212529 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.064
- Navy Blue #001146 ΔE 0.064
- Gunmetal #293241 ΔE 0.075
- Dark Indigo #1F0954 ΔE 0.080
Use #151F36 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.