#2B3E6B
Closest named color: Twilight Blue (#0A437A). oklch(37.1% 0.081 265.4), rgb(43, 62, 107).
Aa
White text reads best on this color (10.47:1).
About this color
#2B3E6B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.081 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 10.47:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #2B3E6B |
| RGB | rgb(43, 62, 107) |
| HSL | hsl(222, 43%, 29%) |
| OKLCH | oklch(37.1% 0.081 265.4) |
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 #2B3E6B | 10.47:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #2B3E6B | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #2B3E6B text on white | 10.47:1 | AAA | Lc 94.2 | Preferred for body text |
| #2B3E6B text on black | 2.00:1 | Fails | Lc -8.4 | 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
#AEC1E9
oklch(81% 0.06 265.1)
-
Step 400
400
#839FDE
oklch(70.6% 0.098 265.6)
-
Step 500
500
#6586D5
oklch(63% 0.125 265.8)
-
Step 600
600
#4C6FC2
oklch(55.6% 0.135 265.1)
-
Step 700
700
#3D5CA8
oklch(49.1% 0.127 265.3)
-
Step 800
800
#334C88
oklch(42.8% 0.104 265.2)
-
Step 900
900 (this color)
#2B3E6B
oklch(37.1% 0.081 265.4)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#2B3E6B 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) | #2B426D | 0.012 |
| Deuteranopia (no green cones) | #233D6A | 0.011 |
| Tritanopia (no blue cones) | #01484F | 0.073 |
| Achromatopsia (no color) | #3F3F3F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3E6B
#2B3E6B
oklch(37.1% 0.081 265.4)
- #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 #2B3E6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.042
- Marine Blue #01386A ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.047
- Charcoal #264653 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.056
- Light Navy #155084 ΔE 0.061
- Cobalt #1E488F ΔE 0.063
Use #2B3E6B 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.