#3B509E
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.129 269.4), rgb(59, 80, 158).
Aa
White text reads best on this color (7.42:1).
About this color
#3B509E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.129 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.038 away. White text reads best on it, at 7.42:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #3B509E |
| RGB | rgb(59, 80, 158) |
| HSL | hsl(227, 46%, 43%) |
| OKLCH | oklch(45.7% 0.129 269.4) |
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 #3B509E | 7.42:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #3B509E | 2.82:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #3B509E text on white | 7.42:1 | AAA | Lc 85.6 | Fine for body text |
| #3B509E text on black | 2.82:1 | Fails | Lc -16.5 | 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
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F6
oklch(88.6% 0.042 269)
-
Step 300
300
#ADBFF2
oklch(80.9% 0.075 269.5)
-
Step 400
400
#829CEC
oklch(70.6% 0.121 269.4)
-
Step 500
500
#6582E6
oklch(63.2% 0.154 269.5)
-
Step 600
600
#4D69D4
oklch(55.6% 0.167 269.3)
-
Step 700
700
#3F57B8
oklch(49.2% 0.155 269.5)
-
Step 800
800 (this color)
#3B509E
oklch(45.7% 0.129 269.4)
-
Step 900
900
#2D3D76
oklch(37.8% 0.099 269.4)
-
Step 950
950
#1A2445
oklch(27% 0.063 269.2)
#3B509E 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) | #285AA1 | 0.030 |
| Deuteranopia (no green cones) | #14519C | 0.035 |
| Tritanopia (no blue cones) | #00626F | 0.111 |
| Achromatopsia (no color) | #555555 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B509E
#3B509E
oklch(45.7% 0.129 269.4)
- #6C5400
#6C5400
oklch(45.8% 0.094 89.5)
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 #3B509E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.040
- Twilight #4E518B ΔE 0.040
- Blueberry #464196 ΔE 0.040
- Cobalt #1E488F ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.051
- Dusky Blue #475F94 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.056
Use #3B509E 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.