#33408B
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.125 272.2), rgb(51, 64, 139).
Aa
White text reads best on this color (9.34:1).
About this color
#33408B is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.125 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #33408B |
| RGB | rgb(51, 64, 139) |
| HSL | hsl(231, 46%, 37%) |
| OKLCH | oklch(40.4% 0.125 272.2) |
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 #33408B | 9.34:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #33408B | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #33408B text on white | 9.34:1 | AAA | Lc 91.3 | Preferred for body text |
| #33408B text on black | 2.24:1 | Fails | Lc -11.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#B0BEF1
oklch(80.8% 0.074 272.7)
-
Step 400
400
#879BE9
oklch(70.6% 0.117 272.2)
-
Step 500
500
#6B81E3
oklch(63.2% 0.149 272)
-
Step 600
600
#5468D1
oklch(55.6% 0.162 272)
-
Step 700
700
#4556B5
oklch(49.2% 0.151 272.1)
-
Step 800
800 (this color)
#33408B
oklch(40.4% 0.125 272.2)
-
Step 900
900
#303C75
oklch(37.7% 0.098 272)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#33408B 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) | #124B8E | 0.038 |
| Deuteranopia (no green cones) | #004389 | 0.040 |
| Tritanopia (no blue cones) | #00515F | 0.106 |
| Achromatopsia (no color) | #474747 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33408B
#33408B
oklch(40.4% 0.125 272.2)
- #594700
#594700
oklch(40.5% 0.083 92.2)
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 #33408B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.048
- Light Navy #155084 ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
- Sapphire #2138AB ΔE 0.061
- Twilight #4E518B ΔE 0.066
Use #33408B 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.