#2A406E
Closest named color: Twilight Blue (#0A437A). oklch(37.8% 0.084 263.6), rgb(42, 64, 110).
Aa
White text reads best on this color (10.20:1).
About this color
#2A406E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.084 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #2A406E |
| RGB | rgb(42, 64, 110) |
| HSL | hsl(221, 45%, 30%) |
| OKLCH | oklch(37.8% 0.084 263.6) |
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 #2A406E | 10.20:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #2A406E | 2.05:1 | Fails | Lc 10.4 | Not readable |
| #2A406E text on white | 10.20:1 | AAA | Lc 93.5 | Preferred for body text |
| #2A406E text on black | 2.05:1 | Fails | Lc -9.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#80A0E0
oklch(70.7% 0.101 263.6)
-
Step 500
500
#6087D7
oklch(63.1% 0.129 263.5)
-
Step 600
600
#476FC4
oklch(55.5% 0.14 263.5)
-
Step 700
700
#395DAA
oklch(49.2% 0.13 263.5)
-
Step 800
800
#2F4C89
oklch(42.6% 0.107 263.4)
-
Step 900
900 (this color)
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#2A406E 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) | #2C4470 | 0.013 |
| Deuteranopia (no green cones) | #233E6D | 0.011 |
| Tritanopia (no blue cones) | #004A51 | 0.074 |
| Achromatopsia (no color) | #414141 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A406E
#2A406E
oklch(37.8% 0.084 263.6)
- #553D00
#553D00
oklch(37.7% 0.077 83.5)
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 #2A406E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.042
- Marine Blue #01386A ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.053
- Light Navy #155084 ΔE 0.054
- Charcoal #264653 ΔE 0.056
- Cobalt #1E488F ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.060
Use #2A406E 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.