#3B599B
Closest named color: Denim Blue (#3B5B92). oklch(47.4% 0.113 264.2), rgb(59, 89, 155).
Aa
White text reads best on this color (6.80:1).
About this color
#3B599B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.113 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.017 away. White text reads best on it, at 6.80:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #3B599B |
| RGB | rgb(59, 89, 155) |
| HSL | hsl(221, 45%, 42%) |
| OKLCH | oklch(47.4% 0.113 264.2) |
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 #3B599B | 6.80:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #3B599B | 3.08:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #3B599B text on white | 6.80:1 | AA | Lc 83.3 | Fine for body text |
| #3B599B text on black | 3.08:1 | AA large text | Lc -18.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#85A0D8
oklch(70.7% 0.088 264.4)
-
Step 500
500
#6788CD
oklch(63.2% 0.111 264)
-
Step 600
600
#4F70BA
oklch(55.5% 0.122 264.6)
-
Step 700
700 (this color)
#3B599B
oklch(47.4% 0.113 264.2)
-
Step 800
800
#344D82
oklch(42.7% 0.094 263.8)
-
Step 900
900
#2E4068
oklch(37.6% 0.073 264.8)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#3B599B 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) | #3C609E | 0.020 |
| Deuteranopia (no green cones) | #2E579A | 0.016 |
| Tritanopia (no blue cones) | #006872 | 0.098 |
| Achromatopsia (no color) | #5B5B5B | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B599B
#3B599B
oklch(47.4% 0.113 264.2)
- #765600
#765600
oklch(47.4% 0.097 83.5)
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 #3B599B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.017
- Dusky Blue #475F94 ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.036
- Twilight #4E518B ΔE 0.037
- Dusk Blue #26538D ΔE 0.037
- Denim #3B638C ΔE 0.042
- Dusk #4E5481 ΔE 0.046
- Peacock Blue #016795 ΔE 0.052
Use #3B599B 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.