#273681
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.127 270.4), rgb(39, 54, 129).
Aa
White text reads best on this color (10.87:1).
About this color
#273681 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.127 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.043 away. White text reads best on it, at 10.87:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #273681 |
| RGB | rgb(39, 54, 129) |
| HSL | hsl(230, 54%, 33%) |
| OKLCH | oklch(36.8% 0.127 270.4) |
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 #273681 | 10.87:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #273681 | 1.93:1 | Fails | Lc 9.1 | Not readable |
| #273681 text on white | 10.87:1 | AAA | Lc 94.8 | Preferred for body text |
| #273681 text on black | 1.93:1 | Fails | Lc -7.8 | 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
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CBD8FD
oklch(88.4% 0.053 270)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5E7CFE
oklch(63.2% 0.195 270.2)
-
Step 600
600
#4860ED
oklch(55.6% 0.213 270.5)
-
Step 700
700
#3A4ECE
oklch(49% 0.198 270.4)
-
Step 800
800
#3041A7
oklch(42.7% 0.164 270.5)
-
Step 900
900 (this color)
#273681
oklch(36.8% 0.127 270.4)
-
Step 950
950
#18224D
oklch(27% 0.08 270.4)
#273681 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) | #004184 | 0.036 |
| Deuteranopia (no green cones) | #00397F | 0.030 |
| Tritanopia (no blue cones) | #004856 | 0.103 |
| Achromatopsia (no color) | #3D3D3D | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273681
#273681
oklch(36.8% 0.127 270.4)
- #4E3D00
#4E3D00
oklch(36.8% 0.075 91)
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 #273681, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Cobalt #1E488F ΔE 0.052
- Marine Blue #01386A ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.058
- Blueberry #464196 ΔE 0.067
- Sapphire #2138AB ΔE 0.070
- Marine #042E60 ΔE 0.072
- Light Navy #155084 ΔE 0.072
Use #273681 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.