#2A3E6A
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.08 264.4), rgb(42, 62, 106).
Aa
White text reads best on this color (10.52:1).
About this color
#2A3E6A is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.080 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.036 away. White text reads best on it, at 10.52:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.52:1 |
Values
| HEX | #2A3E6A |
| RGB | rgb(42, 62, 106) |
| HSL | hsl(221, 43%, 29%) |
| OKLCH | oklch(37% 0.08 264.4) |
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 #2A3E6A | 10.52:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2A3E6A | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #2A3E6A text on white | 10.52:1 | AAA | Lc 94.3 | Preferred for body text |
| #2A3E6A text on black | 1.99:1 | Fails | Lc -8.3 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F0
oklch(88.4% 0.034 265.2)
-
Step 300
300
#ADC1E8
oklch(80.9% 0.06 263.7)
-
Step 400
400
#82A0DD
oklch(70.7% 0.096 263.9)
-
Step 500
500
#6487D4
oklch(63.1% 0.123 264.6)
-
Step 600
600
#4B6FC1
oklch(55.5% 0.134 264.6)
-
Step 700
700
#3C5DA7
oklch(49.2% 0.125 264.2)
-
Step 800
800
#324C87
oklch(42.7% 0.103 264.5)
-
Step 900
900 (this color)
#2A3E6A
oklch(37% 0.08 264.4)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#2A3E6A 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) | #2C426C | 0.013 |
| Deuteranopia (no green cones) | #233C69 | 0.011 |
| Tritanopia (no blue cones) | #00484F | 0.072 |
| Achromatopsia (no color) | #3F3F3F | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3E6A
#2A3E6A
oklch(37% 0.08 264.4)
- #523C00
#523C00
oklch(37.1% 0.076 85.3)
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 #2A3E6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.041
- Marine Blue #01386A ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.045
- Charcoal #264653 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.054
- Light Navy #155084 ΔE 0.062
- Cobalt #1E488F ΔE 0.064
Use #2A3E6A 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.