#273081
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.135 272.6), rgb(39, 48, 129).
Aa
White text reads best on this color (11.50:1).
About this color
#273081 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.135 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.056 away. White text reads best on it, at 11.50:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.50:1 |
Values
| HEX | #273081 |
| RGB | rgb(39, 48, 129) |
| HSL | hsl(234, 54%, 33%) |
| OKLCH | oklch(35.5% 0.135 272.6) |
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 #273081 | 11.50:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #273081 | 1.82:1 | Fails | Lc 7.9 | Not readable |
| #273081 text on white | 11.50:1 | AAA | Lc 96.0 | Preferred for body text |
| #273081 text on black | 1.82:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8198FF
oklch(70.7% 0.153 272.5)
-
Step 500
500
#6479FF
oklch(63% 0.199 272.7)
-
Step 600
600
#4D5BF4
oklch(55.6% 0.226 272.5)
-
Step 700
700
#3F49D4
oklch(49% 0.21 272.6)
-
Step 800
800
#343EAC
oklch(42.8% 0.173 272.6)
-
Step 900
900 (this color)
#273081
oklch(35.5% 0.135 272.6)
-
Step 950
950
#19214F
oklch(27% 0.085 272.1)
#273081 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) | #003D84 | 0.040 |
| Deuteranopia (no green cones) | #00357F | 0.033 |
| Tritanopia (no blue cones) | #004453 | 0.110 |
| Achromatopsia (no color) | #393939 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273081
#273081
oklch(35.5% 0.135 272.6)
- #493A00
#493A00
oklch(35.4% 0.073 92.5)
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 #273081, closest first.
No curated palette has a color within ΔE 0.04 of #273081.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.056
- Twilight Blue #0A437A ΔE 0.056
- Cobalt #1E488F ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.067
- Midnight Blue #191970 ΔE 0.068
- Royal #0C1793 ΔE 0.068
- Marine #042E60 ΔE 0.069
- Sapphire #2138AB ΔE 0.072
Use #273081 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.