#40556A
Closest named color: YInMn Blue (#415A77). oklch(44.1% 0.043 248.8), rgb(64, 85, 106).
Aa
White text reads best on this color (7.70:1).
About this color
#40556A is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.043 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.023 away. White text reads best on it, at 7.70:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.72:1 |
| White text | 7.70:1 |
Values
| HEX | #40556A |
| RGB | rgb(64, 85, 106) |
| HSL | hsl(210, 25%, 33%) |
| OKLCH | oklch(44.1% 0.043 248.8) |
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 #40556A | 7.70:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #40556A | 2.72:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #40556A text on white | 7.70:1 | AAA | Lc 86.7 | Fine for body text |
| #40556A text on black | 2.72:1 | Fails | Lc -15.4 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C2D1
oklch(80.8% 0.026 250)
-
Step 400
400
#8EA3B9
oklch(70.7% 0.04 249.6)
-
Step 500
500
#718DA8
oklch(63.2% 0.052 247.7)
-
Step 600
600
#597693
oklch(55.5% 0.057 248.9)
-
Step 700
700
#49637D
oklch(49% 0.052 248.9)
-
Step 800
800 (this color)
#40556A
oklch(44.1% 0.043 248.8)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1E2731
oklch(26.9% 0.023 251.3)
#40556A 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) | #4D556B | 0.019 |
| Deuteranopia (no green cones) | #48516A | 0.016 |
| Tritanopia (no blue cones) | #325A5C | 0.037 |
| Achromatopsia (no color) | #535353 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40556A
#40556A
oklch(44.1% 0.043 248.8)
- #634F38
#634F38
oklch(44.2% 0.044 70.2)
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 #40556A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.023
- Dusty Grape #545775 ΔE 0.036
- Dusk #4E5481 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.050
- Petrol #005F6A ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.053
- Slate #516572 ΔE 0.056
- Deep Teal #00555A ΔE 0.060
Use #40556A 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.