#2B566D
Closest named color: YInMn Blue (#415A77). oklch(43.3% 0.061 234), rgb(43, 86, 109).
Aa
White text reads best on this color (7.91:1).
About this color
#2B566D is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.061 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.034 away. White text reads best on it, at 7.91:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #2B566D |
| RGB | rgb(43, 86, 109) |
| HSL | hsl(201, 43%, 30%) |
| OKLCH | oklch(43.3% 0.061 234) |
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 #2B566D | 7.91:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #2B566D | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #2B566D text on white | 7.91:1 | AAA | Lc 87.3 | Fine for body text |
| #2B566D text on black | 2.65:1 | Fails | Lc -14.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7DA7BF
oklch(70.6% 0.057 233.7)
-
Step 500
500
#5B91AF
oklch(63.1% 0.073 233.9)
-
Step 600
600
#3F7B9B
oklch(55.6% 0.08 234)
-
Step 700
700
#316784
oklch(49% 0.074 234.5)
-
Step 800
800 (this color)
#2B566D
oklch(43.3% 0.061 234)
-
Step 900
900
#264657
oklch(37.7% 0.048 233.2)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#2B566D 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) | #4B556E | 0.039 |
| Deuteranopia (no green cones) | #424E6D | 0.035 |
| Tritanopia (no blue cones) | #005C5E | 0.044 |
| Achromatopsia (no color) | #515151 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B566D
#2B566D
oklch(43.3% 0.061 234)
- #6B472F
#6B472F
oklch(43.3% 0.062 54.1)
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 #2B566D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.034
- Petrol #005F6A ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.043
- Deep Teal #00555A ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.049
- Light Navy #155084 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.053
Use #2B566D 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.