#273D57
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.4% 0.053 253.3), rgb(39, 61, 87).
Aa
White text reads best on this color (11.10:1).
About this color
#273D57 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.053 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.021 away. White text reads best on it, at 11.10:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.89:1 |
| White text | 11.10:1 |
Values
| HEX | #273D57 |
| RGB | rgb(39, 61, 87) |
| HSL | hsl(213, 38%, 25%) |
| OKLCH | oklch(35.4% 0.053 253.3) |
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 #273D57 | 11.10:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #273D57 | 1.89:1 | Fails | Lc 8.3 | Not readable |
| #273D57 text on white | 11.10:1 | AAA | Lc 95.6 | Preferred for body text |
| #273D57 text on black | 1.89:1 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC3DB
oklch(81% 0.04 253.1)
-
Step 400
400
#85A3C8
oklch(70.6% 0.064 253.9)
-
Step 500
500
#668CBA
oklch(63% 0.082 253.7)
-
Step 600
600
#4D76A6
oklch(55.7% 0.088 253.2)
-
Step 700
700
#3D638F
oklch(49.1% 0.083 253)
-
Step 800
800
#335174
oklch(42.8% 0.069 253.1)
-
Step 900
900 (this color)
#273D57
oklch(35.4% 0.053 253.3)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#273D57 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) | #333E58 | 0.017 |
| Deuteranopia (no green cones) | #2D3956 | 0.014 |
| Tritanopia (no blue cones) | #0F4346 | 0.047 |
| Achromatopsia (no color) | #3C3C3C | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273D57
#273D57
oklch(35.4% 0.053 253.3)
- #4C371A
#4C371A
oklch(35.4% 0.053 73.5)
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 #273D57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.021
- Dark Grey Blue #29465B ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.030
- Charcoal #264653 ΔE 0.032
- Midnight Green #073B4C ΔE 0.037
- Onyx #343A40 ΔE 0.041
- Gunmetal #293241 ΔE 0.046
- Marine Blue #01386A ΔE 0.050
Use #273D57 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.