#27347B
Closest named color: Twilight Blue (#0A437A). oklch(35.8% 0.121 271.1), rgb(39, 52, 123).
Aa
White text reads best on this color (11.26:1).
About this color
#27347B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.121 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.045 away. White text reads best on it, at 11.26:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.86:1 |
| White text | 11.26:1 |
Values
| HEX | #27347B |
| RGB | rgb(39, 52, 123) |
| HSL | hsl(231, 52%, 32%) |
| OKLCH | oklch(35.8% 0.121 271.1) |
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 #27347B | 11.26:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #27347B | 1.86:1 | Fails | Lc 8.2 | Not readable |
| #27347B text on white | 11.26:1 | AAA | Lc 95.7 | Preferred for body text |
| #27347B text on black | 1.86:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ABBEFC
oklch(80.9% 0.09 271.1)
-
Step 400
400
#8099FB
oklch(70.6% 0.146 271.4)
-
Step 500
500
#627CF8
oklch(63% 0.186 271.2)
-
Step 600
600
#4C62E7
oklch(55.7% 0.201 271.2)
-
Step 700
700
#3E50C9
oklch(49.2% 0.188 271.2)
-
Step 800
800
#3242A2
oklch(42.6% 0.155 271)
-
Step 900
900 (this color)
#27347B
oklch(35.8% 0.121 271.1)
-
Step 950
950
#19224B
oklch(26.9% 0.077 271.1)
#27347B 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) | #003F7D | 0.038 |
| Deuteranopia (no green cones) | #00377A | 0.031 |
| Tritanopia (no blue cones) | #004552 | 0.100 |
| Achromatopsia (no color) | #3B3B3B | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #27347B
#27347B
oklch(35.8% 0.121 271.1)
- #4B3B00
#4B3B00
oklch(35.9% 0.073 91.6)
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 #27347B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.045
- Marine Blue #01386A ΔE 0.045
- Cobalt #1E488F ΔE 0.061
- Marine #042E60 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.065
- Midnight Blue #191970 ΔE 0.074
- Blueberry #464196 ΔE 0.075
Use #27347B 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.