#33566B
Closest named color: YInMn Blue (#415A77). oklch(43.6% 0.053 236.2), rgb(51, 86, 107).
Aa
White text reads best on this color (7.82:1).
About this color
#33566B is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.053 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.029 away. White text reads best on it, at 7.82:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #33566B |
| RGB | rgb(51, 86, 107) |
| HSL | hsl(203, 35%, 31%) |
| OKLCH | oklch(43.6% 0.053 236.2) |
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 #33566B | 7.82:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #33566B | 2.68:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #33566B text on white | 7.82:1 | AAA | Lc 87.1 | Fine for body text |
| #33566B text on black | 2.68:1 | Fails | Lc -15.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D2
oklch(80.8% 0.031 235.7)
-
Step 400
400
#83A6BC
oklch(70.7% 0.05 236)
-
Step 500
500
#6390AB
oklch(63.1% 0.064 235.5)
-
Step 600
600
#497A97
oklch(55.7% 0.07 235.9)
-
Step 700
700
#3A6681
oklch(49% 0.065 237.1)
-
Step 800
800 (this color)
#33566B
oklch(43.6% 0.053 236.2)
-
Step 900
900
#2B4555
oklch(37.6% 0.042 236.5)
-
Step 950
950
#1A2932
oklch(27.2% 0.026 235.4)
#33566B 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) | #4C556C | 0.033 |
| Deuteranopia (no green cones) | #454F6B | 0.030 |
| Tritanopia (no blue cones) | #165B5D | 0.041 |
| Achromatopsia (no color) | #525252 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33566B
#33566B
oklch(43.6% 0.053 236.2)
- #684A34
#684A34
oklch(43.6% 0.053 57.1)
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 #33566B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Petrol #005F6A ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.047
- Deep Teal #00555A ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.048
- Dusty Grape #545775 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.050
- Dusk #4E5481 ΔE 0.054
Use #33566B 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.