#33566C
Closest named color: YInMn Blue (#415A77). oklch(43.6% 0.055 237.4), rgb(51, 86, 108).
Aa
White text reads best on this color (7.81:1).
About this color
#33566C is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.055 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.028 away. White text reads best on it, at 7.81:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #33566C |
| RGB | rgb(51, 86, 108) |
| HSL | hsl(203, 36%, 31%) |
| OKLCH | oklch(43.6% 0.055 237.4) |
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 #33566C | 7.81:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #33566C | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #33566C text on white | 7.81:1 | AAA | Lc 87.0 | Fine for body text |
| #33566C text on black | 2.68:1 | Fails | Lc -15.1 | 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
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D3
oklch(80.8% 0.032 237.7)
-
Step 400
400
#83A6BD
oklch(70.7% 0.051 237.2)
-
Step 500
500
#6390AC
oklch(63.2% 0.065 236.5)
-
Step 600
600
#497A98
oklch(55.7% 0.071 236.8)
-
Step 700
700
#3A6682
oklch(49.1% 0.066 238.1)
-
Step 800
800 (this color)
#33566C
oklch(43.6% 0.055 237.4)
-
Step 900
900
#2B4556
oklch(37.7% 0.043 238.1)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#33566C 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) | #4C556D | 0.033 |
| Deuteranopia (no green cones) | #444F6C | 0.029 |
| Tritanopia (no blue cones) | #155C5D | 0.044 |
| Achromatopsia (no color) | #525252 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33566C
#33566C
oklch(43.6% 0.055 237.4)
- #684A33
#684A33
oklch(43.6% 0.054 58.2)
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 #33566C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.028
- Petrol #005F6A ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusty Grape #545775 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.049
- Deep Teal #00555A ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.049
- Dusk #4E5481 ΔE 0.053
Use #33566C 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.