#273B47
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.1% 0.033 235.4), rgb(39, 59, 71).
Aa
White text reads best on this color (11.64:1).
About this color
#273B47 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.033 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.014 away. White text reads best on it, at 11.64:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.80:1 |
| White text | 11.64:1 |
Values
| HEX | #273B47 |
| RGB | rgb(39, 59, 71) |
| HSL | hsl(203, 29%, 22%) |
| OKLCH | oklch(34.1% 0.033 235.4) |
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 #273B47 | 11.64:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #273B47 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #273B47 text on white | 11.64:1 | AAA | Lc 96.7 | Preferred for body text |
| #273B47 text on black | 1.80:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B2C4CF
oklch(81% 0.025 234.5)
-
Step 400
400
#89A5B6
oklch(70.6% 0.04 234.8)
-
Step 500
500
#6C8FA4
oklch(63.1% 0.05 235)
-
Step 600
600
#53798F
oklch(55.6% 0.055 234.5)
-
Step 700
700
#43667A
oklch(49.2% 0.051 234.3)
-
Step 800
800
#385363
oklch(42.7% 0.042 235.1)
-
Step 900
900 (this color)
#273B47
oklch(34.1% 0.033 235.4)
-
Step 950
950
#1D282F
oklch(27% 0.02 236.4)
#273B47 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) | #353A48 | 0.021 |
| Deuteranopia (no green cones) | #313747 | 0.018 |
| Tritanopia (no blue cones) | #1B3E3F | 0.025 |
| Achromatopsia (no color) | #383838 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273B47
#273B47
oklch(34.1% 0.033 235.4)
- #463428
#463428
oklch(34.2% 0.033 55)
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 #273B47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.014
- Onyx #343A40 ΔE 0.021
- Gunmetal #293241 ΔE 0.029
- Midnight Green #073B4C ΔE 0.029
- Charcoal #264653 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.044
Use #273B47 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.