#596CB9
Closest named color: French Blue (#436BAD). oklch(55.2% 0.122 271.5), rgb(89, 108, 185).
Aa
White text reads best on this color (4.91:1).
About this color
#596CB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.122 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.033 away. White text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.27:1 |
| White text | 4.91:1 |
Values
| HEX | #596CB9 |
| RGB | rgb(89, 108, 185) |
| HSL | hsl(228, 41%, 54%) |
| OKLCH | oklch(55.2% 0.122 271.5) |
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 #596CB9 | 4.91:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #596CB9 | 4.27:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #596CB9 text on white | 4.91:1 | AA | Lc 73.9 | Content text, not long reading |
| #596CB9 text on black | 4.27:1 | AA large text | Lc -27.8 | 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 600.
-
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
#8D9ED8
oklch(70.8% 0.087 271.5)
-
Step 500
500
#7185CD
oklch(63.2% 0.111 271.1)
-
Step 600
600 (this color)
#596CB9
oklch(55.2% 0.122 271.5)
-
Step 700
700
#4A5BA1
oklch(49.2% 0.114 271.4)
-
Step 800
800
#3D4A82
oklch(42.6% 0.094 272)
-
Step 900
900
#343F68
oklch(37.8% 0.072 271.3)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#596CB9 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) | #4D75BC | 0.026 |
| Deuteranopia (no green cones) | #426DB7 | 0.027 |
| Tritanopia (no blue cones) | #2E7D89 | 0.110 |
| Achromatopsia (no color) | #707070 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #596CB9
#596CB9
oklch(55.2% 0.122 271.5)
- #8A6F00
#8A6F00
oklch(55.2% 0.113 91.9)
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 #596CB9, closest first.
No curated palette has a color within ΔE 0.04 of #596CB9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.033
- Windows Blue #3778BF ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.055
- Iris #6258C4 ΔE 0.056
- Muted Blue #3B719F ΔE 0.058
- Dull Blue #49759C ΔE 0.061
Use #596CB9 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.