#273A49
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.9% 0.036 242.9), rgb(39, 58, 73).
Aa
White text reads best on this color (11.74:1).
About this color
#273A49 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.036 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.011 away. White text reads best on it, at 11.74:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.78:1 |
| White text | 11.74:1 |
Values
| HEX | #273A49 |
| RGB | rgb(39, 58, 73) |
| HSL | hsl(206, 30%, 22%) |
| OKLCH | oklch(33.9% 0.036 242.9) |
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 #273A49 | 11.74:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #273A49 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #273A49 text on white | 11.74:1 | AAA | Lc 96.9 | Preferred for body text |
| #273A49 text on black | 1.78:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EBEF
oklch(93.7% 0.008 241.7)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D1
oklch(80.9% 0.027 242.8)
-
Step 400
400
#8AA4BA
oklch(70.6% 0.043 244)
-
Step 500
500
#6C8EA9
oklch(63.1% 0.056 242.7)
-
Step 600
600
#547894
oklch(55.7% 0.06 242.5)
-
Step 700
700
#44657E
oklch(49.2% 0.056 241.9)
-
Step 800
800
#385267
oklch(42.7% 0.047 243.5)
-
Step 900
900 (this color)
#273A49
oklch(33.9% 0.036 242.9)
-
Step 950
950
#1D2831
oklch(27.1% 0.023 243.4)
#273A49 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) | #343A4A | 0.019 |
| Deuteranopia (no green cones) | #2F3649 | 0.017 |
| Tritanopia (no blue cones) | #1A3E3F | 0.030 |
| Achromatopsia (no color) | #383838 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273A49
#273A49
oklch(33.9% 0.036 242.9)
- #453424
#453424
oklch(34% 0.036 64.4)
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 #273A49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.011
- Onyx #343A40 ΔE 0.024
- Gunmetal #293241 ΔE 0.026
- Midnight Green #073B4C ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.036
- Charcoal #264653 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.044
Use #273A49 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.