#2B408D
Closest named color: Cobalt (#1E488F). oklch(40.1% 0.13 268.4), rgb(43, 64, 141).
Aa
White text reads best on this color (9.45:1).
About this color
#2B408D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.130 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 9.45:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #2B408D |
| RGB | rgb(43, 64, 141) |
| HSL | hsl(227, 53%, 36%) |
| OKLCH | oklch(40.1% 0.13 268.4) |
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 #2B408D | 9.45:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #2B408D | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #2B408D text on white | 9.45:1 | AAA | Lc 91.5 | Preferred for body text |
| #2B408D text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD9FE
oklch(88.6% 0.054 267.9)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#4061F0
oklch(55.6% 0.217 268.3)
-
Step 700
700
#334FD1
oklch(49.1% 0.202 268.3)
-
Step 800
800
#2A42A9
oklch(42.8% 0.167 268.3)
-
Step 900
900 (this color)
#2B408D
oklch(40.1% 0.13 268.4)
-
Step 950
950
#16224E
oklch(26.9% 0.083 268.8)
#2B408D 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) | #0A4B90 | 0.034 |
| Deuteranopia (no green cones) | #00428B | 0.030 |
| Tritanopia (no blue cones) | #005260 | 0.106 |
| Achromatopsia (no color) | #464646 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B408D
#2B408D
oklch(40.1% 0.13 268.4)
- #5A4500
#5A4500
oklch(40.2% 0.082 88.8)
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 #2B408D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Blueberry #464196 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.042
- Twilight Blue #0A437A ΔE 0.044
- Light Navy #155084 ΔE 0.051
- Dusk Blue #26538D ΔE 0.053
- Sapphire #2138AB ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.065
Use #2B408D 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.