#33539D
Closest named color: Dusk Blue (#26538D). oklch(45.8% 0.126 264.4), rgb(51, 83, 157).
Aa
White text reads best on this color (7.33:1).
About this color
#33539D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.126 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #33539D |
| RGB | rgb(51, 83, 157) |
| HSL | hsl(222, 51%, 41%) |
| OKLCH | oklch(45.8% 0.126 264.4) |
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 #33539D | 7.33:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #33539D | 2.86:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #33539D text on white | 7.33:1 | AAA | Lc 85.2 | Fine for body text |
| #33539D text on black | 2.86:1 | Fails | Lc -16.8 | Dividers and decoration only |
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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C1F1
oklch(81% 0.073 264)
-
Step 400
400
#7B9FEA
oklch(70.7% 0.118 264.1)
-
Step 500
500
#5B85E4
oklch(63.1% 0.151 264.5)
-
Step 600
600
#416CD2
oklch(55.5% 0.164 264.5)
-
Step 700
700
#335AB6
oklch(49.1% 0.153 264.2)
-
Step 800
800 (this color)
#33539D
oklch(45.8% 0.126 264.4)
-
Step 900
900
#273F75
oklch(37.8% 0.097 264.3)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#33539D 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) | #2E5BA0 | 0.022 |
| Deuteranopia (no green cones) | #19529B | 0.023 |
| Tritanopia (no blue cones) | #006470 | 0.104 |
| Achromatopsia (no color) | #565656 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33539D
#33539D
oklch(45.8% 0.126 264.4)
- #705200
#705200
oklch(45.8% 0.094 84.1)
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 #33539D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight #4E518B ΔE 0.044
- Cobalt #1E488F ΔE 0.045
- Dusky Blue #475F94 ΔE 0.048
- Blueberry #464196 ΔE 0.050
- Light Navy #155084 ΔE 0.051
Use #33539D 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.