#151A2C
Closest named color: Rich Black (#0D1B2A). oklch(22.2% 0.036 271.4), rgb(21, 26, 44).
Aa
White text reads best on this color (17.26:1).
About this color
#151A2C is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.036 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.013 away. White text reads best on it, at 17.26:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.26:1 |
Values
| HEX | #151A2C |
| RGB | rgb(21, 26, 44) |
| HSL | hsl(227, 35%, 13%) |
| OKLCH | oklch(22.2% 0.036 271.4) |
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 #151A2C | 17.26:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #151A2C | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #151A2C text on white | 17.26:1 | AAA | Lc 104.1 | Preferred for body text |
| #151A2C text on black | 1.21:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E9
oklch(88.6% 0.023 269.4)
-
Step 300
300
#B6C0DD
oklch(80.9% 0.042 270.4)
-
Step 400
400
#919FCC
oklch(70.8% 0.068 271.2)
-
Step 500
500
#7686BF
oklch(63% 0.088 271.7)
-
Step 600
600
#5F6FAB
oklch(55.5% 0.095 271.6)
-
Step 700
700
#4F5D93
oklch(49.1% 0.088 271.8)
-
Step 800
800
#404C77
oklch(42.6% 0.073 271.2)
-
Step 900
900
#374060
oklch(37.8% 0.056 271.5)
-
Step 950
950 (this color)
#151A2C
oklch(22.2% 0.036 271.4)
#151A2C 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) | #141C2D | 0.007 |
| Deuteranopia (no green cones) | #121A2C | 0.005 |
| Tritanopia (no blue cones) | #0D1E21 | 0.032 |
| Achromatopsia (no color) | #1B1B1B | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151A2C
#151A2C
oklch(22.2% 0.036 271.4)
- #211A06
#211A06
oklch(22.1% 0.035 90.4)
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 #151A2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.013
- Dark #1B2431 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.048
- Jet #212529 ΔE 0.048
- Rich Navy #001219 ΔE 0.060
- Navy Blue #001146 ΔE 0.068
- Almost Black #070D0D ΔE 0.078
- Midnight Purple #280137 ΔE 0.079
Use #151A2C 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.