#3B509B
Closest named color: Dusk Blue (#26538D). oklch(45.5% 0.124 269.2), rgb(59, 80, 155).
Aa
White text reads best on this color (7.48:1).
About this color
#3B509B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.124 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.034 away. White text reads best on it, at 7.48:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.48:1 |
Values
| HEX | #3B509B |
| RGB | rgb(59, 80, 155) |
| HSL | hsl(227, 45%, 42%) |
| OKLCH | oklch(45.5% 0.124 269.2) |
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 #3B509B | 7.48:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #3B509B | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3B509B text on white | 7.48:1 | AAA | Lc 85.8 | Fine for body text |
| #3B509B text on black | 2.80:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADBFF1
oklch(80.8% 0.074 269.3)
-
Step 400
400
#839DE9
oklch(70.7% 0.116 268.9)
-
Step 500
500
#6582E3
oklch(63% 0.15 269.2)
-
Step 600
600
#4E6AD1
oklch(55.7% 0.162 269.2)
-
Step 700
700
#3F57B5
oklch(49% 0.151 269.3)
-
Step 800
800 (this color)
#3B509B
oklch(45.5% 0.124 269.2)
-
Step 900
900
#2D3D75
oklch(37.7% 0.098 269.3)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#3B509B 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) | #2B599E | 0.027 |
| Deuteranopia (no green cones) | #1A5199 | 0.031 |
| Tritanopia (no blue cones) | #00616E | 0.107 |
| Achromatopsia (no color) | #555555 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B509B
#3B509B
oklch(45.5% 0.124 269.2)
- #6B5300
#6B5300
oklch(45.4% 0.093 89.3)
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 #3B509B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.037
- Twilight #4E518B ΔE 0.037
- Blueberry #464196 ΔE 0.040
- Cobalt #1E488F ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.050
- Dusk #4E5481 ΔE 0.053
Use #3B509B 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.