#273651
Closest named color: Prussian Blue (#1D3557). oklch(33.3% 0.052 261.7), rgb(39, 54, 81).
Aa
White text reads best on this color (12.11:1).
About this color
#273651 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.052 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 12.11:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.11:1 |
Values
| HEX | #273651 |
| RGB | rgb(39, 54, 81) |
| HSL | hsl(219, 35%, 24%) |
| OKLCH | oklch(33.3% 0.052 261.7) |
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 #273651 | 12.11:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #273651 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #273651 text on white | 12.11:1 | AAA | Lc 97.6 | Preferred for body text |
| #273651 text on black | 1.73:1 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C1DB
oklch(80.9% 0.04 262.9)
-
Step 400
400
#8BA1C8
oklch(70.6% 0.063 261.8)
-
Step 500
500
#6F8ABA
oklch(63.2% 0.079 261.6)
-
Step 600
600
#5773A6
oklch(55.6% 0.086 261.9)
-
Step 700
700
#47608F
oklch(49% 0.082 262.4)
-
Step 800
800
#3A4F74
oklch(42.7% 0.067 261.3)
-
Step 900
900 (this color)
#273651
oklch(33.3% 0.052 261.7)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#273651 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) | #2C3852 | 0.010 |
| Deuteranopia (no green cones) | #273450 | 0.006 |
| Tritanopia (no blue cones) | #163C40 | 0.046 |
| Achromatopsia (no color) | #363636 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273651
#273651
oklch(33.3% 0.052 261.7)
- #443314
#443314
oklch(33.3% 0.052 80.3)
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 #273651, 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 0.021
- Gunmetal #293241 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.034
- Midnight Green #073B4C ΔE 0.035
- Onyx #343A40 ΔE 0.041
- Marine Blue #01386A ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.051
Use #273651 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.