#2A427C
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.103 265.1), rgb(42, 66, 124).
Aa
White text reads best on this color (9.68:1).
About this color
#2A427C is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.103 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 9.68:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #2A427C |
| RGB | rgb(42, 66, 124) |
| HSL | hsl(222, 49%, 33%) |
| OKLCH | oklch(39.2% 0.103 265.1) |
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 #2A427C | 9.68:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #2A427C | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #2A427C text on white | 9.68:1 | AAA | Lc 92.2 | Preferred for body text |
| #2A427C text on black | 2.16:1 | Fails | Lc -10.2 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBD9F6
oklch(88.4% 0.043 265)
-
Step 300
300
#A9C0F3
oklch(80.8% 0.077 265.8)
-
Step 400
400
#7B9EEE
oklch(70.7% 0.124 265.4)
-
Step 500
500
#5A84E8
oklch(63.1% 0.158 265.1)
-
Step 600
600
#416BD6
oklch(55.6% 0.171 265.1)
-
Step 700
700
#3359BA
oklch(49.2% 0.159 265)
-
Step 800
800
#2B4996
oklch(42.7% 0.131 265.2)
-
Step 900
900 (this color)
#2A427C
oklch(39.2% 0.103 265.1)
-
Step 950
950
#172546
oklch(27.1% 0.064 265.1)
#2A427C 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) | #26487E | 0.017 |
| Deuteranopia (no green cones) | #19417B | 0.018 |
| Tritanopia (no blue cones) | #004F59 | 0.085 |
| Achromatopsia (no color) | #444444 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A427C
#2A427C
oklch(39.2% 0.103 265.1)
- #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 #2A427C, 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 0.034
- Light Navy #155084 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.054
- Marine Blue #01386A ΔE 0.057
- Blueberry #464196 ΔE 0.060
Use #2A427C 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.