#2B406D
Closest named color: Twilight Blue (#0A437A). oklch(37.7% 0.082 264), rgb(43, 64, 109).
Aa
White text reads best on this color (10.20:1).
About this color
#2B406D is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.082 and its hue 264°. 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 10.20:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #2B406D |
| RGB | rgb(43, 64, 109) |
| HSL | hsl(221, 43%, 30%) |
| OKLCH | oklch(37.7% 0.082 264) |
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 #2B406D | 10.20:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #2B406D | 2.05:1 | Fails | Lc 10.4 | Not readable |
| #2B406D text on white | 10.20:1 | AAA | Lc 93.6 | Preferred for body text |
| #2B406D 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
#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
#ADC1E9
oklch(80.9% 0.061 264.2)
-
Step 400
400
#81A0DE
oklch(70.7% 0.098 263.6)
-
Step 500
500
#6287D5
oklch(63.1% 0.125 263.9)
-
Step 600
600
#496FC3
oklch(55.5% 0.138 264.1)
-
Step 700
700
#3B5DA8
oklch(49.2% 0.126 264)
-
Step 800
800
#314C88
oklch(42.7% 0.105 264.2)
-
Step 900
900 (this color)
#2B406D
oklch(37.7% 0.082 264)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#2B406D 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) | #2D446F | 0.013 |
| Deuteranopia (no green cones) | #253E6C | 0.010 |
| Tritanopia (no blue cones) | #004A51 | 0.073 |
| Achromatopsia (no color) | #414141 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B406D
#2B406D
oklch(37.7% 0.082 264)
- #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 #2B406D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.041
- Marine Blue #01386A ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.053
- Charcoal #264653 ΔE 0.054
- Light Navy #155084 ΔE 0.055
- Cobalt #1E488F ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.059
Use #2B406D 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.