#151F42
Closest named color: Oxford Blue (#1B263B). oklch(25.2% 0.067 269.1), rgb(21, 31, 66).
Aa
White text reads best on this color (16.07:1).
About this color
#151F42 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.067 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.031 away. White text reads best on it, at 16.07:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.07:1 |
Values
| HEX | #151F42 |
| RGB | rgb(21, 31, 66) |
| HSL | hsl(227, 52%, 17%) |
| OKLCH | oklch(25.2% 0.067 269.1) |
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 #151F42 | 16.07:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #151F42 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #151F42 text on white | 16.07:1 | AAA | Lc 102.9 | Preferred for body text |
| #151F42 text on black | 1.30:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABBFF5
oklch(80.9% 0.08 268.8)
-
Step 400
400
#809CF0
oklch(70.7% 0.127 269)
-
Step 500
500
#6281EB
oklch(63.1% 0.163 269.1)
-
Step 600
600
#4A67DA
oklch(55.5% 0.179 269.2)
-
Step 700
700
#3C55BD
oklch(49.1% 0.166 269.2)
-
Step 800
800
#314699
oklch(42.6% 0.138 269.1)
-
Step 900
900
#2B3C79
oklch(37.7% 0.106 269.1)
-
Step 950
950 (this color)
#151F42
oklch(25.2% 0.067 269.1)
#151F42 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) | #0E2343 | 0.014 |
| Deuteranopia (no green cones) | #071F41 | 0.017 |
| Tritanopia (no blue cones) | #00272D | 0.058 |
| Achromatopsia (no color) | #212121 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151F42
#151F42
oklch(25.2% 0.067 269.1)
- #2C2000
#2C2000
oklch(25.1% 0.051 88.2)
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 #151F42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.031
- Dark #1B2431 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.049
- Navy Blue #001146 ΔE 0.055
- Jet #212529 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.062
- Marine #042E60 ΔE 0.067
Use #151F42 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.