#273D53
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.2% 0.048 249.3), rgb(39, 61, 83).
Aa
White text reads best on this color (11.17:1).
About this color
#273D53 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.048 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.016 away. White text reads best on it, at 11.17:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #273D53 |
| RGB | rgb(39, 61, 83) |
| HSL | hsl(210, 36%, 24%) |
| OKLCH | oklch(35.2% 0.048 249.3) |
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 #273D53 | 11.17:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #273D53 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #273D53 text on white | 11.17:1 | AAA | Lc 95.8 | Preferred for body text |
| #273D53 text on black | 1.87:1 | 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
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#D0DBE6
oklch(88.6% 0.019 248)
-
Step 300
300
#B0C3D7
oklch(80.9% 0.035 249.6)
-
Step 400
400
#86A4C3
oklch(70.7% 0.056 249.5)
-
Step 500
500
#678DB4
oklch(63% 0.073 249.7)
-
Step 600
600
#4E77A0
oklch(55.6% 0.079 249.4)
-
Step 700
700
#3E6489
oklch(49.1% 0.074 248.9)
-
Step 800
800
#34526F
oklch(42.8% 0.06 248.6)
-
Step 900
900 (this color)
#273D53
oklch(35.2% 0.048 249.3)
-
Step 950
950
#1B2835
oklch(27.1% 0.03 249)
#273D53 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) | #343E54 | 0.019 |
| Deuteranopia (no green cones) | #2F3953 | 0.016 |
| Tritanopia (no blue cones) | #134244 | 0.041 |
| Achromatopsia (no color) | #3B3B3B | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273D53
#273D53
oklch(35.2% 0.048 249.3)
- #4B361E
#4B361E
oklch(35.1% 0.048 68.9)
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 #273D53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.016
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal #264653 ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.033
- Midnight Green #073B4C ΔE 0.033
- Onyx #343A40 ΔE 0.035
- Gunmetal #293241 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.046
Use #273D53 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.