#2C556B
Closest named color: YInMn Blue (#415A77). oklch(42.9% 0.059 233.9), rgb(44, 85, 107).
Aa
White text reads best on this color (8.01:1).
About this color
#2C556B is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.059 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.036 away. White text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.61:1 |
| White text | 8.01:1 |
Values
| HEX | #2C556B |
| RGB | rgb(44, 85, 107) |
| HSL | hsl(201, 42%, 30%) |
| OKLCH | oklch(42.9% 0.059 233.9) |
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 #2C556B | 8.01:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #2C556B | 2.61:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #2C556B text on white | 8.01:1 | AAA | Lc 87.7 | Fine for body text |
| #2C556B text on black | 2.61:1 | Fails | Lc -14.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDCE4
oklch(88.6% 0.019 232.5)
-
Step 300
300
#ACC5D4
oklch(81% 0.034 234.2)
-
Step 400
400
#7FA7BE
oklch(70.7% 0.055 233.8)
-
Step 500
500
#5D91AE
oklch(63.1% 0.071 233.9)
-
Step 600
600
#427B99
oklch(55.7% 0.076 233.4)
-
Step 700
700
#336783
oklch(49% 0.071 234.4)
-
Step 800
800 (this color)
#2C556B
oklch(42.9% 0.059 233.9)
-
Step 900
900
#284656
oklch(37.8% 0.045 233)
-
Step 950
950
#182933
oklch(27.1% 0.029 235.2)
#2C556B 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) | #4A546C | 0.037 |
| Deuteranopia (no green cones) | #424D6B | 0.034 |
| Tritanopia (no blue cones) | #005B5C | 0.045 |
| Achromatopsia (no color) | #505050 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C556B
#2C556B
oklch(42.9% 0.059 233.9)
- #694730
#694730
oklch(43% 0.059 54.6)
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 #2C556B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.036
- Petrol #005F6A ΔE 0.037
- Deep Teal #00555A ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.050
- Light Navy #155084 ΔE 0.051
Use #2C556B 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.