#273D55
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.3% 0.05 251.4), rgb(39, 61, 85).
Aa
White text reads best on this color (11.14:1).
About this color
#273D55 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.050 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.019 away. White text reads best on it, at 11.14:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.88:1 |
| White text | 11.14:1 |
Values
| HEX | #273D55 |
| RGB | rgb(39, 61, 85) |
| HSL | hsl(211, 37%, 24%) |
| OKLCH | oklch(35.3% 0.05 251.4) |
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 #273D55 | 11.14:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #273D55 | 1.88:1 | Fails | Lc 8.2 | Not readable |
| #273D55 text on white | 11.14:1 | AAA | Lc 95.7 | Preferred for body text |
| #273D55 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3D9
oklch(80.9% 0.038 250.8)
-
Step 400
400
#85A4C6
oklch(70.8% 0.061 251)
-
Step 500
500
#668DB7
oklch(63.1% 0.077 250.9)
-
Step 600
600
#4D76A3
oklch(55.5% 0.084 251.7)
-
Step 700
700
#3E638C
oklch(49% 0.079 252)
-
Step 800
800
#335171
oklch(42.6% 0.064 251)
-
Step 900
900 (this color)
#273D55
oklch(35.3% 0.05 251.4)
-
Step 950
950
#1B2836
oklch(27.2% 0.032 250.9)
#273D55 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) | #333E56 | 0.017 |
| Deuteranopia (no green cones) | #2E3955 | 0.015 |
| Tritanopia (no blue cones) | #114245 | 0.043 |
| Achromatopsia (no color) | #3B3B3B | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273D55
#273D55
oklch(35.3% 0.05 251.4)
- #4C371C
#4C371C
oklch(35.4% 0.051 71.9)
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 #273D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.019
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.031
- Midnight Green #073B4C ΔE 0.035
- Onyx #343A40 ΔE 0.038
- Gunmetal #293241 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.049
Use #273D55 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.