#273857
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.059 261.8), rgb(39, 56, 87).
Aa
White text reads best on this color (11.73:1).
About this color
#273857 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.059 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 11.73:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.78:1 |
| White text | 11.73:1 |
Values
| HEX | #273857 |
| RGB | rgb(39, 56, 87) |
| HSL | hsl(219, 38%, 25%) |
| OKLCH | oklch(34.1% 0.059 261.8) |
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 #273857 | 11.73:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #273857 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #273857 text on white | 11.73:1 | AAA | Lc 96.9 | Preferred for body text |
| #273857 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B1C1DE
oklch(80.8% 0.045 262.4)
-
Step 400
400
#88A1CE
oklch(70.6% 0.072 262)
-
Step 500
500
#6B8AC1
oklch(63.2% 0.091 261.5)
-
Step 600
600
#5373AD
oklch(55.7% 0.098 261.7)
-
Step 700
700
#436095
oklch(49.1% 0.092 261.7)
-
Step 800
800
#374F79
oklch(42.8% 0.076 261.1)
-
Step 900
900 (this color)
#273857
oklch(34.1% 0.059 261.8)
-
Step 950
950
#1C2639
oklch(26.9% 0.038 262.7)
#273857 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) | #2C3A58 | 0.010 |
| Deuteranopia (no green cones) | #263656 | 0.007 |
| Tritanopia (no blue cones) | #113F43 | 0.054 |
| Achromatopsia (no color) | #383838 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273857
#273857
oklch(34.1% 0.059 261.8)
- #48350F
#48350F
oklch(34.2% 0.059 81.4)
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 #273857, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.025
- Midnight Green #073B4C ΔE 0.038
- Gunmetal #293241 ΔE 0.039
- Marine Blue #01386A ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.045
- Onyx #343A40 ΔE 0.047
Use #273857 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.