#04273D
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.057 241.5), rgb(4, 39, 61).
Aa
White text reads best on this color (15.40:1).
About this color
#04273D is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.057 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.024 away. White text reads best on it, at 15.40:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.40:1 |
Values
| HEX | #04273D |
| RGB | rgb(4, 39, 61) |
| HSL | hsl(203, 88%, 13%) |
| OKLCH | oklch(26.1% 0.057 241.5) |
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 #04273D | 15.40:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #04273D | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #04273D text on white | 15.40:1 | AAA | Lc 102.1 | Preferred for body text |
| #04273D text on black | 1.36:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C4DDF0
oklch(88.5% 0.037 240.7)
-
Step 300
300
#9AC7E8
oklch(80.9% 0.067 240.4)
-
Step 400
400
#5FA9DD
oklch(70.8% 0.106 241.1)
-
Step 500
500
#2392D4
oklch(63.2% 0.137 241.3)
-
Step 600
600
#007AB8
oklch(55.5% 0.131 241.7)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466C
oklch(37.7% 0.089 241.5)
-
Step 950
950 (this color)
#04273D
oklch(26.1% 0.057 241.5)
#04273D 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) | #1D273E | 0.028 |
| Deuteranopia (no green cones) | #15223D | 0.022 |
| Tritanopia (no blue cones) | #002C2F | 0.037 |
| Achromatopsia (no color) | #252525 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04273D
#04273D
oklch(26.1% 0.057 241.5)
- #371D03
#371D03
oklch(26.1% 0.056 61.8)
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 #04273D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.024
- Dark #1B2431 ΔE 0.031
- Jet #212529 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.056
- Gunmetal #293241 ΔE 0.062
- Marine #042E60 ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.070
Use #04273D 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.