#273777
Closest named color: Twilight Blue (#0A437A). oklch(36.2% 0.111 269.6), rgb(39, 55, 119).
Aa
White text reads best on this color (11.05:1).
About this color
#273777 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.111 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.038 away. White text reads best on it, at 11.05:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.89:1 |
| White text | 11.05:1 |
Values
| HEX | #273777 |
| RGB | rgb(39, 55, 119) |
| HSL | hsl(228, 51%, 31%) |
| OKLCH | oklch(36.2% 0.111 269.6) |
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 #273777 | 11.05:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #273777 | 1.89:1 | Fails | Lc 8.6 | Not readable |
| #273777 text on white | 11.05:1 | AAA | Lc 95.3 | Preferred for body text |
| #273777 text on black | 1.89:1 | Fails | Lc -7.4 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBFF7
oklch(80.9% 0.083 269.3)
-
Step 400
400
#809BF4
oklch(70.7% 0.134 269.9)
-
Step 500
500
#6180EF
oklch(63.1% 0.17 269.3)
-
Step 600
600
#4A66DE
oklch(55.6% 0.185 269.5)
-
Step 700
700
#3C54C1
oklch(49.2% 0.172 269.6)
-
Step 800
800
#31459C
oklch(42.6% 0.143 269.6)
-
Step 900
900 (this color)
#273777
oklch(36.2% 0.111 269.6)
-
Step 950
950
#192348
oklch(26.9% 0.07 269.8)
#273777 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) | #114079 | 0.029 |
| Deuteranopia (no green cones) | #003876 | 0.031 |
| Tritanopia (no blue cones) | #004651 | 0.093 |
| Achromatopsia (no color) | #3C3C3C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273777
#273777
oklch(36.2% 0.111 269.6)
- #4D3B00
#4D3B00
oklch(36.2% 0.074 89.3)
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 #273777, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.038
- Marine Blue #01386A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.058
- Cobalt #1E488F ΔE 0.058
- Marine #042E60 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.064
- Light Navy #155084 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.074
Use #273777 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.