#2A3D6E
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.088 266.3), rgb(42, 61, 110).
Aa
White text reads best on this color (10.54:1).
About this color
#2A3D6E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.088 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.033 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #2A3D6E |
| RGB | rgb(42, 61, 110) |
| HSL | hsl(223, 45%, 30%) |
| OKLCH | oklch(37% 0.088 266.3) |
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 #2A3D6E | 10.54:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2A3D6E | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #2A3D6E text on white | 10.54:1 | AAA | Lc 94.3 | Preferred for body text |
| #2A3D6E 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ADC0EC
oklch(80.8% 0.066 266.6)
-
Step 400
400
#829FE3
oklch(70.8% 0.105 266.1)
-
Step 500
500
#6385DB
oklch(63% 0.135 266.3)
-
Step 600
600
#4B6DC8
oklch(55.5% 0.146 266.3)
-
Step 700
700
#3C5BAD
oklch(49.1% 0.136 266)
-
Step 800
800
#324B8C
oklch(42.8% 0.112 266)
-
Step 900
900 (this color)
#2A3D6E
oklch(37% 0.088 266.3)
-
Step 950
950
#1A2542
oklch(27% 0.056 266.9)
#2A3D6E 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) | #274270 | 0.015 |
| Deuteranopia (no green cones) | #1E3C6D | 0.015 |
| Tritanopia (no blue cones) | #004850 | 0.077 |
| Achromatopsia (no color) | #3F3F3F | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3D6E
#2A3D6E
oklch(37% 0.088 266.3)
- #513C00
#513C00
oklch(36.9% 0.076 86.3)
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 #2A3D6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Marine Blue #01386A ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.049
- Cobalt #1E488F ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.060
- Light Navy #155084 ΔE 0.061
- Charcoal #264653 ΔE 0.061
Use #2A3D6E 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.