#2B556E
Closest named color: YInMn Blue (#415A77). oklch(43% 0.063 236.8), rgb(43, 85, 110).
Aa
White text reads best on this color (7.99:1).
About this color
#2B556E is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.063 and its hue 237°. 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 7.99:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #2B556E |
| RGB | rgb(43, 85, 110) |
| HSL | hsl(202, 44%, 30%) |
| OKLCH | oklch(43% 0.063 236.8) |
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 #2B556E | 7.99:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #2B556E | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #2B556E text on white | 7.99:1 | AAA | Lc 87.6 | Fine for body text |
| #2B556E text on black | 2.62:1 | Fails | Lc -14.6 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D6
oklch(80.9% 0.037 236.6)
-
Step 400
400
#7EA7C1
oklch(70.8% 0.059 236.5)
-
Step 500
500
#5C91B1
oklch(63.2% 0.074 236.1)
-
Step 600
600
#407A9D
oklch(55.5% 0.082 237.2)
-
Step 700
700
#326786
oklch(49.1% 0.075 236.7)
-
Step 800
800 (this color)
#2B556E
oklch(43% 0.063 236.8)
-
Step 900
900
#274658
oklch(37.8% 0.048 235.5)
-
Step 950
950
#172934
oklch(27.1% 0.031 236.4)
#2B556E 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) | #49546F | 0.037 |
| Deuteranopia (no green cones) | #404E6E | 0.031 |
| Tritanopia (no blue cones) | #005B5D | 0.047 |
| Achromatopsia (no color) | #515151 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B556E
#2B556E
oklch(43% 0.063 236.8)
- #6A472C
#6A472C
oklch(43.1% 0.063 57.8)
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 #2B556E, 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 0.039
- Deep Sea Blue #015482 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.043
- Deep Teal #00555A ΔE 0.046
- Light Navy #155084 ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.051
Use #2B556E 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.