#43557C
Closest named color: Dusk (#4E5481). oklch(45.2% 0.068 264.8), rgb(67, 85, 124).
Aa
White text reads best on this color (7.42:1).
About this color
#43557C is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.068 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.018 away. White text reads best on it, at 7.42:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #43557C |
| RGB | rgb(67, 85, 124) |
| HSL | hsl(221, 30%, 37%) |
| OKLCH | oklch(45.2% 0.068 264.8) |
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 #43557C | 7.42:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #43557C | 2.82:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #43557C text on white | 7.42:1 | AAA | Lc 85.7 | Fine for body text |
| #43557C text on black | 2.82:1 | Fails | Lc -16.3 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DB
oklch(80.9% 0.039 264.3)
-
Step 400
400
#8DA1C9
oklch(70.8% 0.063 264)
-
Step 500
500
#7189BB
oklch(63.1% 0.081 264.4)
-
Step 600
600
#5A72A7
oklch(55.6% 0.088 265.1)
-
Step 700
700
#495F90
oklch(49% 0.084 265.1)
-
Step 800
800 (this color)
#43557C
oklch(45.2% 0.068 264.8)
-
Step 900
900
#34415E
oklch(37.7% 0.053 265.4)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#43557C 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) | #47587E | 0.011 |
| Deuteranopia (no green cones) | #41537B | 0.007 |
| Tritanopia (no blue cones) | #2E5D63 | 0.061 |
| Achromatopsia (no color) | #555555 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43557C
#43557C
oklch(45.2% 0.068 264.8)
- #675326
#675326
oklch(45.3% 0.068 85.5)
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 #43557C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.018
- YInMn Blue #415A77 ΔE 0.019
- Dusty Grape #545775 ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.029
- Twilight #4E518B ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.037
- Denim #3B638C ΔE 0.043
- Dusk Blue #26538D ΔE 0.043
Use #43557C 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.