#04213F
Closest named color: Oxford Blue (#1B263B). oklch(24.6% 0.067 252.4), rgb(4, 33, 63).
Aa
White text reads best on this color (16.22:1).
About this color
#04213F is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.067 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.035 away. White text reads best on it, at 16.22:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.22:1 |
Values
| HEX | #04213F |
| RGB | rgb(4, 33, 63) |
| HSL | hsl(211, 88%, 13%) |
| OKLCH | oklch(24.6% 0.067 252.4) |
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 #04213F | 16.22:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #04213F | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #04213F text on white | 16.22:1 | AAA | Lc 102.9 | Preferred for body text |
| #04213F text on black | 1.29:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9CC4F3
oklch(80.8% 0.079 252.8)
-
Step 400
400
#63A4ED
oklch(70.6% 0.127 252.5)
-
Step 500
500
#328BE7
oklch(63% 0.162 252.6)
-
Step 600
600
#0074D1
oklch(55.7% 0.167 252.1)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#0B4277
oklch(37.6% 0.105 252.5)
-
Step 950
950 (this color)
#04213F
oklch(24.6% 0.067 252.4)
#04213F 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) | #122340 | 0.017 |
| Deuteranopia (no green cones) | #071E3E | 0.010 |
| Tritanopia (no blue cones) | #00282C | 0.050 |
| Achromatopsia (no color) | #202020 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04213F
#04213F
oklch(24.6% 0.067 252.4)
- #301C00
#301C00
oklch(24.7% 0.053 72.4)
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 #04213F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.035
- Dark #1B2431 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.042
- Navy Blue #001146 ΔE 0.052
- Jet #212529 ΔE 0.059
- Marine #042E60 ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.070
- Dark Indigo #1F0954 ΔE 0.076
Use #04213F 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.