#273E67
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.077 261.2), rgb(39, 62, 103).
Aa
White text reads best on this color (10.65:1).
About this color
#273E67 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.077 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.037 away. White text reads best on it, at 10.65:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.65:1 |
Values
| HEX | #273E67 |
| RGB | rgb(39, 62, 103) |
| HSL | hsl(218, 45%, 28%) |
| OKLCH | oklch(36.6% 0.077 261.2) |
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 #273E67 | 10.65:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #273E67 | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #273E67 text on white | 10.65:1 | AAA | Lc 94.6 | Preferred for body text |
| #273E67 text on black | 1.97:1 | Fails | Lc -8.0 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ACC2E7
oklch(81% 0.058 260.8)
-
Step 400
400
#80A1DA
oklch(70.6% 0.092 261.1)
-
Step 500
500
#6089D0
oklch(63.1% 0.117 260.8)
-
Step 600
600
#4771BE
oklch(55.6% 0.129 261.5)
-
Step 700
700
#385FA3
oklch(49.1% 0.118 260.7)
-
Step 800
800
#2F4E84
oklch(42.8% 0.097 260.8)
-
Step 900
900 (this color)
#273E67
oklch(36.6% 0.077 261.2)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#273E67 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) | #2D4169 | 0.013 |
| Deuteranopia (no green cones) | #243C66 | 0.008 |
| Tritanopia (no blue cones) | #00474D | 0.067 |
| Achromatopsia (no color) | #3E3E3E | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273E67
#273E67
oklch(36.6% 0.077 261.2)
- #533A00
#533A00
oklch(36.7% 0.076 81.4)
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 #273E67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.037
- Twilight Blue #0A437A ΔE 0.037
- Marine Blue #01386A ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.047
- Charcoal #264653 ΔE 0.049
- Midnight Green #073B4C ΔE 0.058
- Marine #042E60 ΔE 0.064
Use #273E67 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.