#151A33
Closest named color: Rich Black (#0D1B2A). oklch(22.7% 0.049 273.4), rgb(21, 26, 51).
Aa
White text reads best on this color (17.10:1).
About this color
#151A33 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.049 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 17.10:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.10:1 |
Values
| HEX | #151A33 |
| RGB | rgb(21, 26, 51) |
| HSL | hsl(230, 42%, 14%) |
| OKLCH | oklch(22.7% 0.049 273.4) |
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 #151A33 | 17.10:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #151A33 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #151A33 text on white | 17.10:1 | AAA | Lc 103.9 | Preferred for body text |
| #151A33 text on black | 1.22:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE7
oklch(81% 0.058 273)
-
Step 400
400
#8E9DDB
oklch(70.8% 0.093 273.4)
-
Step 500
500
#7383D1
oklch(63.1% 0.119 273.7)
-
Step 600
600
#5C6BBE
oklch(55.5% 0.129 273.7)
-
Step 700
700
#4C59A4
oklch(49.1% 0.12 273.7)
-
Step 800
800
#3E4985
oklch(42.7% 0.1 273.6)
-
Step 900
900
#353E6A
oklch(37.8% 0.076 273.5)
-
Step 950
950 (this color)
#151A33
oklch(22.7% 0.049 273.4)
#151A33 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) | #101D34 | 0.012 |
| Deuteranopia (no green cones) | #0D1A32 | 0.012 |
| Tritanopia (no blue cones) | #091F24 | 0.042 |
| Achromatopsia (no color) | #1C1C1C | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151A33
#151A33
oklch(22.7% 0.049 273.4)
- #241B00
#241B00
oklch(22.7% 0.046 91.6)
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 #151A33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.043
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.057
- Rich Navy #001219 ΔE 0.069
- Midnight Purple #280137 ΔE 0.074
- Very Dark Purple #2A0134 ΔE 0.075
Use #151A33 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.