#04234B
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.083 256.6), rgb(4, 35, 75).
Aa
White text reads best on this color (15.58:1).
About this color
#04234B is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.083 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.042 away. White text reads best on it, at 15.58:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.58:1 |
Values
| HEX | #04234B |
| RGB | rgb(4, 35, 75) |
| HSL | hsl(214, 90%, 15%) |
| OKLCH | oklch(26.1% 0.083 256.6) |
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 #04234B | 15.58:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #04234B | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #04234B text on white | 15.58:1 | AAA | Lc 102.2 | Preferred for body text |
| #04234B text on black | 1.34:1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C3DBFD
oklch(88.5% 0.054 257.1)
-
Step 300
300
#98C3FF
oklch(80.9% 0.097 256.8)
-
Step 400
400
#5CA1FF
oklch(70.6% 0.155 256.6)
-
Step 500
500
#2386FF
oklch(63.2% 0.2 256.6)
-
Step 600
600
#006EE1
oklch(55.5% 0.194 256.7)
-
Step 700
700
#005CBF
oklch(49% 0.172 256.8)
-
Step 800
800
#004B9E
oklch(42.6% 0.15 256.7)
-
Step 900
900
#013F85
oklch(37.8% 0.131 256.5)
-
Step 950
950 (this color)
#04234B
oklch(26.1% 0.083 256.6)
#04234B 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) | #0B274C | 0.015 |
| Deuteranopia (no green cones) | #00214A | 0.008 |
| Tritanopia (no blue cones) | #002D33 | 0.063 |
| Achromatopsia (no color) | #242424 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04234B
#04234B
oklch(26.1% 0.083 256.6)
- #332000
#332000
oklch(26.1% 0.055 76.6)
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 #04234B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.042
- Marine #042E60 ΔE 0.049
- Dark #1B2431 ΔE 0.055
- Navy Blue #001146 ΔE 0.055
- Rich Black #0D1B2A ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.067
- Dark Indigo #1F0954 ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.068
Use #04234B 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.