#05283E
Closest named color: Oxford Blue (#1B263B). oklch(26.5% 0.056 241.4), rgb(5, 40, 62).
Aa
White text reads best on this color (15.22:1).
About this color
#05283E is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.056 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 15.22:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.22:1 |
Values
| HEX | #05283E |
| RGB | rgb(5, 40, 62) |
| HSL | hsl(203, 85%, 13%) |
| OKLCH | oklch(26.5% 0.056 241.4) |
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 #05283E | 15.22:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #05283E | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #05283E text on white | 15.22:1 | AAA | Lc 101.9 | Preferred for body text |
| #05283E text on black | 1.37:1 | 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
#9BC7E8
oklch(81% 0.066 241)
-
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)
#05283E
oklch(26.5% 0.056 241.4)
#05283E 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) | #1E283F | 0.028 |
| Deuteranopia (no green cones) | #16233E | 0.022 |
| Tritanopia (no blue cones) | #002D30 | 0.037 |
| Achromatopsia (no color) | #262626 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05283E
#05283E
oklch(26.5% 0.056 241.4)
- #381E03
#381E03
oklch(26.5% 0.056 62.7)
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 #05283E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Dark #1B2431 ΔE 0.032
- Jet #212529 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.053
- Gunmetal #293241 ΔE 0.058
- Marine #042E60 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.066
Use #05283E 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.