#00274C
Closest named color: Oxford Blue (#1B263B). oklch(27.1% 0.08 251.6), rgb(0, 39, 76).
Aa
White text reads best on this color (15.05:1).
About this color
#00274C is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.080 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.040 away. White text reads best on it, at 15.05:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.05:1 |
Values
| HEX | #00274C |
| RGB | rgb(0, 39, 76) |
| HSL | hsl(209, 100%, 15%) |
| OKLCH | oklch(27.1% 0.08 251.6) |
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 #00274C | 15.05:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #00274C | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #00274C text on white | 15.05:1 | AAA | Lc 101.6 | Preferred for body text |
| #00274C text on black | 1.39:1 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DDECFC
oklch(93.7% 0.027 249.9)
-
Step 200
200
#C0DCFC
oklch(88.4% 0.053 251.9)
-
Step 300
300
#93C5FD
oklch(80.9% 0.096 251.8)
-
Step 400
400
#51A4FC
oklch(70.7% 0.153 252)
-
Step 500
500
#008BF5
oklch(63.2% 0.186 251.5)
-
Step 600
600
#0074CF
oklch(55.5% 0.165 251.7)
-
Step 700
700
#0062AF
oklch(49.2% 0.144 251.3)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900
#00427A
oklch(37.7% 0.112 251.7)
-
Step 950
950 (this color)
#00274C
oklch(27.1% 0.08 251.6)
#00274C 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) | #132A4D | 0.021 |
| Deuteranopia (no green cones) | #03234B | 0.012 |
| Tritanopia (no blue cones) | #003035 | 0.059 |
| Achromatopsia (no color) | #262626 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00274C
#00274C
oklch(27.1% 0.08 251.6)
- #382100
#382100
oklch(27.1% 0.058 71.5)
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 #00274C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.040
- Marine #042E60 ΔE 0.041
- Dark #1B2431 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.061
- Navy Blue #001146 ΔE 0.067
- Gunmetal #293241 ΔE 0.068
- Midnight Green #073B4C ΔE 0.069
Use #00274C 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.