#273773
Closest named color: Marine Blue (#01386A). oklch(35.8% 0.105 269.3), rgb(39, 55, 115).
Aa
White text reads best on this color (11.16:1).
About this color
#273773 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.105 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.036 away. White text reads best on it, at 11.16:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #273773 |
| RGB | rgb(39, 55, 115) |
| HSL | hsl(227, 49%, 30%) |
| OKLCH | oklch(35.8% 0.105 269.3) |
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 #273773 | 11.16:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #273773 | 1.88:1 | Fails | Lc 8.3 | Not readable |
| #273773 text on white | 11.16:1 | AAA | Lc 95.6 | Preferred for body text |
| #273773 text on black | 1.88:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ACBFF4
oklch(80.9% 0.078 269.3)
-
Step 400
400
#819CEF
oklch(70.7% 0.126 269.3)
-
Step 500
500
#6381EA
oklch(63.1% 0.161 269.4)
-
Step 600
600
#4B68D8
oklch(55.6% 0.175 269.1)
-
Step 700
700
#3D56BB
oklch(49.2% 0.161 269.2)
-
Step 800
800
#324798
oklch(42.8% 0.135 269.1)
-
Step 900
900 (this color)
#273773
oklch(35.8% 0.105 269.3)
-
Step 950
950
#192447
oklch(27.1% 0.067 268.5)
#273773 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) | #163F75 | 0.026 |
| Deuteranopia (no green cones) | #043872 | 0.029 |
| Tritanopia (no blue cones) | #00454F | 0.090 |
| Achromatopsia (no color) | #3B3B3B | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273773
#273773
oklch(35.8% 0.105 269.3)
- #4C3A00
#4C3A00
oklch(35.8% 0.073 89.1)
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 #273773, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.036
- Twilight Blue #0A437A ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.051
- Marine #042E60 ΔE 0.057
- Cobalt #1E488F ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.072
Use #273773 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.