#05313B
Closest named color: Oxford Blue (#1B263B). oklch(29% 0.048 217.2), rgb(5, 49, 59).
Aa
White text reads best on this color (13.91:1).
About this color
#05313B is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.048 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.041 away. White text reads best on it, at 13.91:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.50:1 |
| White text | 13.91:1 |
Values
| HEX | #05313B |
| RGB | rgb(5, 49, 59) |
| HSL | hsl(191, 84%, 13%) |
| OKLCH | oklch(29% 0.048 217.2) |
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 #05313B | 13.91:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #05313B | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #05313B text on white | 13.91:1 | AAA | Lc 100.3 | Preferred for body text |
| #05313B text on black | 1.50:1 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF1
oklch(93.6% 0.017 215.5)
-
Step 200
200
#C3DFE7
oklch(88.6% 0.032 216.8)
-
Step 300
300
#97CAD9
oklch(80.8% 0.057 217.8)
-
Step 400
400
#55AFC6
oklch(70.8% 0.092 216.9)
-
Step 500
500
#0099B6
oklch(63% 0.113 217.6)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950 (this color)
#05313B
oklch(29% 0.048 217.2)
#05313B 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) | #2A2F3C | 0.041 |
| Deuteranopia (no green cones) | #232A3B | 0.037 |
| Tritanopia (no blue cones) | #003434 | 0.020 |
| Achromatopsia (no color) | #2C2C2C | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05313B
#05313B
oklch(29% 0.048 217.2)
- #40221A
#40221A
oklch(29% 0.049 35.8)
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 #05313B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.041
- Midnight Green #073B4C ΔE 0.041
- Gunmetal #293241 ΔE 0.042
- Dark #1B2431 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.048
- Jet #212529 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.058
Use #05313B 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.