#2B427A
Closest named color: Twilight Blue (#0A437A). oklch(39.1% 0.099 265.3), rgb(43, 66, 122).
Aa
White text reads best on this color (9.70:1).
About this color
#2B427A is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.099 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 9.70:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #2B427A |
| RGB | rgb(43, 66, 122) |
| HSL | hsl(223, 48%, 32%) |
| OKLCH | oklch(39.1% 0.099 265.3) |
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 #2B427A | 9.70:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #2B427A | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #2B427A text on white | 9.70:1 | AAA | Lc 92.3 | Preferred for body text |
| #2B427A text on black | 2.16:1 | Fails | Lc -10.1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C0F2
oklch(80.8% 0.075 265.5)
-
Step 400
400
#7D9EEB
oklch(70.6% 0.119 265.8)
-
Step 500
500
#5C84E5
oklch(63% 0.153 265.4)
-
Step 600
600
#436CD3
oklch(55.7% 0.165 265.1)
-
Step 700
700
#3559B7
oklch(49.1% 0.155 265.3)
-
Step 800
800
#2C4994
oklch(42.6% 0.128 265.4)
-
Step 900
900 (this color)
#2B427A
oklch(39.1% 0.099 265.3)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#2B427A 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) | #28487C | 0.017 |
| Deuteranopia (no green cones) | #1C4179 | 0.017 |
| Tritanopia (no blue cones) | #004F58 | 0.085 |
| Achromatopsia (no color) | #444444 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B427A
#2B427A
oklch(39.1% 0.099 265.3)
- #594100
#594100
oklch(39.1% 0.08 84.7)
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 #2B427A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Cobalt #1E488F ΔE 0.037
- Light Navy #155084 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.053
- Dusk Blue #26538D ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.054
- Marine Blue #01386A ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.058
Use #2B427A 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.