#43518A
Closest named color: Twilight (#4E518B). oklch(45.1% 0.095 271.7), rgb(67, 81, 138).
Aa
White text reads best on this color (7.54:1).
About this color
#43518A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.095 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.016 away. White text reads best on it, at 7.54:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #43518A |
| RGB | rgb(67, 81, 138) |
| HSL | hsl(228, 35%, 40%) |
| OKLCH | oklch(45.1% 0.095 271.7) |
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 #43518A | 7.54:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #43518A | 2.78:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #43518A text on white | 7.54:1 | AAA | Lc 86.1 | Fine for body text |
| #43518A text on black | 2.78:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EE
oklch(88.4% 0.031 273.6)
-
Step 300
300
#B4BFE5
oklch(80.9% 0.055 272.4)
-
Step 400
400
#8D9ED9
oklch(70.8% 0.089 271.6)
-
Step 500
500
#7184CE
oklch(63% 0.114 271.9)
-
Step 600
600
#5A6DBB
oklch(55.6% 0.123 271.6)
-
Step 700
700
#4A5BA1
oklch(49.2% 0.114 271.4)
-
Step 800
800 (this color)
#43518A
oklch(45.1% 0.095 271.7)
-
Step 900
900
#343E69
oklch(37.6% 0.075 272.4)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#43518A 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) | #3B578C | 0.018 |
| Deuteranopia (no green cones) | #335189 | 0.020 |
| Tritanopia (no blue cones) | #255D67 | 0.084 |
| Achromatopsia (no color) | #545454 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43518A
#43518A
oklch(45.1% 0.095 271.7)
- #685300
#685300
oklch(45.1% 0.092 91.8)
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 #43518A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.016
- Dusk #4E5481 ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.029
- Dusk Blue #26538D ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.046
- Light Navy #155084 ΔE 0.048
Use #43518A 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.