#273477
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.115 271.1), rgb(39, 52, 119).
Aa
White text reads best on this color (11.38:1).
About this color
#273477 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.115 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.041 away. White text reads best on it, at 11.38:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.84:1 |
| White text | 11.38:1 |
Values
| HEX | #273477 |
| RGB | rgb(39, 52, 119) |
| HSL | hsl(230, 51%, 31%) |
| OKLCH | oklch(35.5% 0.115 271.1) |
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 #273477 | 11.38:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #273477 | 1.84:1 | Fails | Lc 7.9 | Not readable |
| #273477 text on white | 11.38:1 | AAA | Lc 95.9 | Preferred for body text |
| #273477 text on black | 1.84:1 | 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 900.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEF9
oklch(80.9% 0.086 271.2)
-
Step 400
400
#819AF6
oklch(70.6% 0.138 271)
-
Step 500
500
#647EF3
oklch(63.2% 0.177 271.1)
-
Step 600
600
#4D64E1
oklch(55.6% 0.191 271)
-
Step 700
700
#3F52C4
oklch(49.2% 0.178 271.1)
-
Step 800
800
#33449E
oklch(42.7% 0.147 270.8)
-
Step 900
900 (this color)
#273477
oklch(35.5% 0.115 271.1)
-
Step 950
950
#1A234A
oklch(27.1% 0.073 271.1)
#273477 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) | #053E79 | 0.035 |
| Deuteranopia (no green cones) | #003676 | 0.032 |
| Tritanopia (no blue cones) | #004450 | 0.096 |
| Achromatopsia (no color) | #3A3A3A | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273477
#273477
oklch(35.5% 0.115 271.1)
- #4A3A00
#4A3A00
oklch(35.6% 0.073 91.4)
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 #273477, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.041
- Twilight Blue #0A437A ΔE 0.045
- Marine #042E60 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.059
- Cobalt #1E488F ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.068
- Midnight Blue #191970 ΔE 0.073
- Blueberry #464196 ΔE 0.079
Use #273477 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.