#27509B
Closest named color: Dusk Blue (#26538D). oklch(44.4% 0.131 261.3), rgb(39, 80, 155).
Aa
White text reads best on this color (7.75:1).
About this color
#27509B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.131 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.026 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #27509B |
| RGB | rgb(39, 80, 155) |
| HSL | hsl(219, 60%, 38%) |
| OKLCH | oklch(44.4% 0.131 261.3) |
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 #27509B | 7.75:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #27509B | 2.70:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #27509B text on white | 7.75:1 | AAA | Lc 86.6 | Fine for body text |
| #27509B text on black | 2.70:1 | Fails | Lc -15.5 | Dividers and decoration only |
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 800.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F3
oklch(81% 0.077 260.8)
-
Step 400
400
#75A0ED
oklch(70.7% 0.123 261.5)
-
Step 500
500
#5186E7
oklch(63% 0.157 261.4)
-
Step 600
600
#356ED5
oklch(55.6% 0.17 261.1)
-
Step 700
700
#285BB9
oklch(49.1% 0.159 261.3)
-
Step 800
800 (this color)
#27509B
oklch(44.4% 0.131 261.3)
-
Step 900
900
#213F77
oklch(37.7% 0.102 261.6)
-
Step 950
950
#142546
oklch(26.9% 0.066 262.3)
#27509B 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) | #27589E | 0.022 |
| Deuteranopia (no green cones) | #064D99 | 0.023 |
| Tritanopia (no blue cones) | #00626E | 0.104 |
| Achromatopsia (no color) | #525252 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #27509B
#27509B
oklch(44.4% 0.131 261.3)
- #6D4D00
#6D4D00
oklch(44.3% 0.092 81.1)
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 #27509B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.026
- Cobalt #1E488F ΔE 0.031
- Light Navy #155084 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.047
- Blueberry #464196 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.050
- Twilight #4E518B ΔE 0.054
Use #27509B 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.