#33508B
Closest named color: Dusk Blue (#26538D). oklch(43.9% 0.104 263.1), rgb(51, 80, 139).
Aa
White text reads best on this color (7.89:1).
About this color
#33508B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.104 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.014 away. White text reads best on it, at 7.89:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.66:1 |
| White text | 7.89:1 |
Values
| HEX | #33508B |
| RGB | rgb(51, 80, 139) |
| HSL | hsl(220, 46%, 37%) |
| OKLCH | oklch(43.9% 0.104 263.1) |
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 #33508B | 7.89:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #33508B | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #33508B text on white | 7.89:1 | AAA | Lc 87.2 | Fine for body text |
| #33508B text on black | 2.66:1 | Fails | Lc -14.9 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#81A0DD
oklch(70.6% 0.096 263.4)
-
Step 500
500
#6188D4
oklch(63.2% 0.123 262.7)
-
Step 600
600
#4870C1
oklch(55.6% 0.134 263)
-
Step 700
700
#3A5DA7
oklch(49.1% 0.125 263.4)
-
Step 800
800 (this color)
#33508B
oklch(43.9% 0.104 263.1)
-
Step 900
900
#2A406C
oklch(37.6% 0.081 263)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#33508B 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) | #36568D | 0.018 |
| Deuteranopia (no green cones) | #294E8A | 0.013 |
| Tritanopia (no blue cones) | #005D66 | 0.089 |
| Achromatopsia (no color) | #515151 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33508B
#33508B
oklch(43.9% 0.104 263.1)
- #6A4D00
#6A4D00
oklch(44% 0.09 83.6)
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 #33508B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.014
- Light Navy #155084 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.031
- Cobalt #1E488F ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.035
- Twilight #4E518B ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.038
- Dusk #4E5481 ΔE 0.043
Use #33508B 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.