#43599C
Closest named color: Denim Blue (#3B5B92). oklch(48% 0.111 268.3), rgb(67, 89, 156).
Aa
White text reads best on this color (6.67:1).
About this color
#43599C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.111 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.021 away. White text reads best on it, at 6.67:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #43599C |
| RGB | rgb(67, 89, 156) |
| HSL | hsl(225, 40%, 44%) |
| OKLCH | oklch(48% 0.111 268.3) |
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 #43599C | 6.67:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #43599C | 3.14:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #43599C text on white | 6.67:1 | AA | Lc 82.8 | Fine for body text |
| #43599C text on black | 3.14:1 | AA large text | Lc -19.1 | 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 700.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B2C0E4
oklch(80.9% 0.053 268.5)
-
Step 400
400
#8A9FD7
oklch(70.8% 0.086 268.3)
-
Step 500
500
#6D86CC
oklch(63.1% 0.11 268.2)
-
Step 600
600
#566FB9
oklch(55.7% 0.119 268.3)
-
Step 700
700 (this color)
#43599C
oklch(48% 0.111 268.3)
-
Step 800
800
#3A4C81
oklch(42.8% 0.091 268.2)
-
Step 900
900
#313F68
oklch(37.6% 0.073 268.5)
-
Step 950
950
#1D253D
oklch(26.9% 0.046 269.1)
#43599C 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) | #3C609F | 0.020 |
| Deuteranopia (no green cones) | #31589B | 0.021 |
| Tritanopia (no blue cones) | #0B6873 | 0.100 |
| Achromatopsia (no color) | #5C5C5C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43599C
#43599C
oklch(48% 0.111 268.3)
- #745900
#745900
oklch(47.8% 0.098 88.1)
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 #43599C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.021
- Dusky Blue #475F94 ΔE 0.025
- Twilight #4E518B ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.042
- Denim #3B638C ΔE 0.044
- Dusk #4E5481 ΔE 0.045
- Dusk Blue #26538D ΔE 0.045
- French Blue #436BAD ΔE 0.053
Use #43599C 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.