#2B408F
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.133 268.5), rgb(43, 64, 143).
Aa
White text reads best on this color (9.40:1).
About this color
#2B408F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.133 and its hue 269°. 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 9.40:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #2B408F |
| RGB | rgb(43, 64, 143) |
| HSL | hsl(227, 54%, 36%) |
| OKLCH | oklch(40.2% 0.133 268.5) |
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 #2B408F | 9.40:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #2B408F | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #2B408F text on white | 9.40:1 | AAA | Lc 91.4 | Preferred for body text |
| #2B408F text on black | 2.23:1 | Fails | Lc -11.0 | 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 800.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABBFF4
oklch(80.8% 0.078 268.5)
-
Step 400
400
#809DEE
oklch(70.8% 0.123 268.2)
-
Step 500
500
#6282E9
oklch(63.2% 0.159 268.6)
-
Step 600
600
#4A69D7
oklch(55.7% 0.172 268.5)
-
Step 700
700
#3B56BA
oklch(49% 0.161 268.5)
-
Step 800
800 (this color)
#2B408F
oklch(40.2% 0.133 268.5)
-
Step 900
900
#2B3D78
oklch(37.8% 0.103 268.4)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#2B408F 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) | #054B92 | 0.035 |
| Deuteranopia (no green cones) | #00428D | 0.030 |
| Tritanopia (no blue cones) | #005361 | 0.109 |
| Achromatopsia (no color) | #464646 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B408F
#2B408F
oklch(40.2% 0.133 268.5)
- #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 #2B408F, 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 0.040
- Dark Slate Blue #483D8B ΔE 0.042
- Twilight Blue #0A437A ΔE 0.046
- Sapphire #2138AB ΔE 0.051
- Light Navy #155084 ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.066
Use #2B408F 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.