#273881
Closest named color: Twilight Blue (#0A437A). oklch(37.2% 0.125 269.5), rgb(39, 56, 129).
Aa
White text reads best on this color (10.66:1).
About this color
#273881 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.125 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.039 away. White text reads best on it, at 10.66:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #273881 |
| RGB | rgb(39, 56, 129) |
| HSL | hsl(229, 54%, 33%) |
| OKLCH | oklch(37.2% 0.125 269.5) |
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 #273881 | 10.66:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #273881 | 1.96:1 | Fails | Lc 9.5 | Not readable |
| #273881 text on white | 10.66:1 | AAA | Lc 94.4 | Preferred for body text |
| #273881 text on black | 1.96:1 | Fails | Lc -8.2 | 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
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD8FC
oklch(88.4% 0.052 269.6)
-
Step 300
300
#A8BEFE
oklch(80.8% 0.094 269.6)
-
Step 400
400
#7C9AFD
oklch(70.7% 0.149 269.6)
-
Step 500
500
#5D7DFB
oklch(63.1% 0.191 269.5)
-
Step 600
600
#4662EA
oklch(55.6% 0.207 269.5)
-
Step 700
700
#3850CC
oklch(49.1% 0.193 269.4)
-
Step 800
800
#2E42A5
oklch(42.6% 0.161 269.6)
-
Step 900
900 (this color)
#273881
oklch(37.2% 0.125 269.5)
-
Step 950
950
#17224C
oklch(26.8% 0.079 269.4)
#273881 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) | #004284 | 0.034 |
| Deuteranopia (no green cones) | #003A80 | 0.029 |
| Tritanopia (no blue cones) | #004A56 | 0.104 |
| Achromatopsia (no color) | #3E3E3E | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273881
#273881
oklch(37.2% 0.125 269.5)
- #503E00
#503E00
oklch(37.3% 0.076 90.1)
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 #273881, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.039
- Cobalt #1E488F ΔE 0.047
- Marine Blue #01386A ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.056
- Blueberry #464196 ΔE 0.064
- Light Navy #155084 ΔE 0.067
- Sapphire #2138AB ΔE 0.070
- Marine #042E60 ΔE 0.074
Use #273881 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.