#05203F
Closest named color: Oxford Blue (#1B263B). oklch(24.3% 0.067 254.2), rgb(5, 32, 63).
Aa
White text reads best on this color (16.34:1).
About this color
#05203F is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.067 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 16.34:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.34:1 |
Values
| HEX | #05203F |
| RGB | rgb(5, 32, 63) |
| HSL | hsl(212, 85%, 13%) |
| OKLCH | oklch(24.3% 0.067 254.2) |
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 #05203F | 16.34:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #05203F | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #05203F text on white | 16.34:1 | AAA | Lc 103.1 | Preferred for body text |
| #05203F text on black | 1.28:1 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9DC4F4
oklch(80.9% 0.08 253.9)
-
Step 400
400
#66A3EE
oklch(70.6% 0.128 254.4)
-
Step 500
500
#378AE9
oklch(63% 0.164 254.3)
-
Step 600
600
#0272D7
oklch(55.7% 0.177 254.1)
-
Step 700
700
#005FB7
oklch(49.1% 0.158 254.4)
-
Step 800
800
#004E97
oklch(42.8% 0.136 254.1)
-
Step 900
900
#0F4178
oklch(37.6% 0.107 254.4)
-
Step 950
950 (this color)
#05203F
oklch(24.3% 0.067 254.2)
#05203F 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) | #102340 | 0.017 |
| Deuteranopia (no green cones) | #051D3E | 0.010 |
| Tritanopia (no blue cones) | #00272C | 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°).
- #05203F
#05203F
oklch(24.3% 0.067 254.2)
- #2E1C00
#2E1C00
oklch(24.4% 0.051 75.5)
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 #05203F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Rich Black #0D1B2A ΔE 0.041
- Dark #1B2431 ΔE 0.042
- Navy Blue #001146 ΔE 0.049
- Jet #212529 ΔE 0.061
- Marine #042E60 ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.072
- Dark Indigo #1F0954 ΔE 0.074
Use #05203F 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.