#27315B
Closest named color: Prussian Blue (#1D3557). oklch(32.7% 0.076 271.6), rgb(39, 49, 91).
Aa
White text reads best on this color (12.52:1).
About this color
#27315B is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.076 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 12.52:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.52:1 |
Values
| HEX | #27315B |
| RGB | rgb(39, 49, 91) |
| HSL | hsl(228, 40%, 25%) |
| OKLCH | oklch(32.7% 0.076 271.6) |
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 #27315B | 12.52:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #27315B | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #27315B text on white | 12.52:1 | AAA | Lc 98.3 | Preferred for body text |
| #27315B text on black | 1.67:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D1D8EF
oklch(88.4% 0.033 272.2)
-
Step 300
300
#B3BFE6
oklch(80.8% 0.057 271.7)
-
Step 400
400
#8C9DDA
oklch(70.6% 0.092 271.9)
-
Step 500
500
#7084CF
oklch(63% 0.116 271.4)
-
Step 600
600
#596DBD
oklch(55.7% 0.126 271.2)
-
Step 700
700
#495AA3
oklch(49% 0.118 271.6)
-
Step 800
800
#3C4A84
oklch(42.7% 0.098 271.5)
-
Step 900
900 (this color)
#27315B
oklch(32.7% 0.076 271.6)
-
Step 950
950
#1E253E
oklch(27.1% 0.048 271.1)
#27315B 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) | #1F365D | 0.017 |
| Deuteranopia (no green cones) | #1A315A | 0.017 |
| Tritanopia (no blue cones) | #0E3A41 | 0.068 |
| Achromatopsia (no color) | #343434 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #27315B
#27315B
oklch(32.7% 0.076 271.6)
- #413300
#413300
oklch(32.7% 0.067 91.9)
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 #27315B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Marine #042E60 ΔE 0.039
- Marine Blue #01386A ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.046
- Gunmetal #293241 ΔE 0.048
- Midnight Green #073B4C ΔE 0.054
- Onyx #343A40 ΔE 0.066
Use #27315B 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.