#40557A
Closest named color: YInMn Blue (#415A77). oklch(44.9% 0.066 261.3), rgb(64, 85, 122).
Aa
White text reads best on this color (7.50:1).
About this color
#40557A is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.066 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.018 away. White text reads best on it, at 7.50:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #40557A |
| RGB | rgb(64, 85, 122) |
| HSL | hsl(218, 31%, 36%) |
| OKLCH | oklch(44.9% 0.066 261.3) |
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 #40557A | 7.50:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #40557A | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #40557A text on white | 7.50:1 | AAA | Lc 86.0 | Fine for body text |
| #40557A text on black | 2.79:1 | Fails | Lc -16.0 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C1DA
oklch(80.8% 0.039 262.1)
-
Step 400
400
#8BA1C8
oklch(70.6% 0.063 261.8)
-
Step 500
500
#6E8ABA
oklch(63.1% 0.08 260.9)
-
Step 600
600
#5773A6
oklch(55.6% 0.086 261.9)
-
Step 700
700
#47618E
oklch(49.2% 0.079 261)
-
Step 800
800 (this color)
#40557A
oklch(44.9% 0.066 261.3)
-
Step 900
900
#32425D
oklch(37.8% 0.051 260.6)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#40557A 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) | #47587C | 0.014 |
| Deuteranopia (no green cones) | #415279 | 0.009 |
| Tritanopia (no blue cones) | #295D62 | 0.060 |
| Achromatopsia (no color) | #555555 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40557A
#40557A
oklch(44.9% 0.066 261.3)
- #685127
#685127
oklch(44.9% 0.066 80.8)
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 #40557A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.018
- Dusk #4E5481 ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusty Grape #545775 ΔE 0.031
- Twilight #4E518B ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.039
- Dusk Blue #26538D ΔE 0.043
- Denim #3B638C ΔE 0.045
Use #40557A 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.