#273E58
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.7% 0.054 252.3), rgb(39, 62, 88).
Aa
White text reads best on this color (10.95:1).
About this color
#273E58 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.054 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.023 away. White text reads best on it, at 10.95:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #273E58 |
| RGB | rgb(39, 62, 88) |
| HSL | hsl(212, 39%, 25%) |
| OKLCH | oklch(35.7% 0.054 252.3) |
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 #273E58 | 10.95:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #273E58 | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #273E58 text on white | 10.95:1 | AAA | Lc 95.3 | Preferred for body text |
| #273E58 text on black | 1.91:1 | Fails | Lc -7.4 | 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
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AEC3DB
oklch(80.9% 0.041 251.8)
-
Step 400
400
#84A4C8
oklch(70.8% 0.064 251.7)
-
Step 500
500
#648DBA
oklch(63.1% 0.082 251.4)
-
Step 600
600
#4B76A7
oklch(55.6% 0.091 252.6)
-
Step 700
700
#3C638F
oklch(49.1% 0.084 252.5)
-
Step 800
800
#325174
oklch(42.7% 0.069 252.4)
-
Step 900
900 (this color)
#273E58
oklch(35.7% 0.054 252.3)
-
Step 950
950
#1A2737
oklch(26.9% 0.035 254.1)
#273E58 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) | #343F59 | 0.019 |
| Deuteranopia (no green cones) | #2D3A57 | 0.014 |
| Tritanopia (no blue cones) | #0E4447 | 0.047 |
| Achromatopsia (no color) | #3C3C3C | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273E58
#273E58
oklch(35.7% 0.054 252.3)
- #4E381A
#4E381A
oklch(35.8% 0.054 73.1)
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 #273E58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.023
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal #264653 ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.033
- Midnight Green #073B4C ΔE 0.039
- Onyx #343A40 ΔE 0.042
- Gunmetal #293241 ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.051
Use #273E58 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.