#3D509E
Closest named color: Twilight (#4E518B). oklch(45.8% 0.128 270.4), rgb(61, 80, 158).
Aa
White text reads best on this color (7.39:1).
About this color
#3D509E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.128 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.039 away. White text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.83:1 |
| White text | 7.39:1 |
Values
| HEX | #3D509E |
| RGB | rgb(61, 80, 158) |
| HSL | hsl(228, 44%, 43%) |
| OKLCH | oklch(45.8% 0.128 270.4) |
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 #3D509E | 7.39:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #3D509E | 2.83:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #3D509E text on white | 7.39:1 | AAA | Lc 85.5 | Fine for body text |
| #3D509E text on black | 2.83:1 | Fails | Lc -16.6 | 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
#CED8F6
oklch(88.4% 0.043 270.9)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#849CEB
oklch(70.7% 0.119 270.3)
-
Step 500
500
#6781E5
oklch(63.1% 0.153 270.5)
-
Step 600
600
#5068D3
oklch(55.5% 0.166 270.6)
-
Step 700
700
#4156B7
oklch(49.1% 0.155 270.5)
-
Step 800
800 (this color)
#3D509E
oklch(45.8% 0.128 270.4)
-
Step 900
900
#2E3C76
oklch(37.6% 0.1 270.7)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#3D509E 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 | 0.031 |
| Deuteranopia (no green cones) | #16519C | 0.036 |
| Tritanopia (no blue cones) | #00626F | 0.112 |
| Achromatopsia (no color) | #565656 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D509E
#3D509E
oklch(45.8% 0.128 270.4)
- #6B5400
#6B5400
oklch(45.7% 0.093 90.3)
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 #3D509E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.039
- Dusk Blue #26538D ΔE 0.039
- Blueberry #464196 ΔE 0.040
- Cobalt #1E488F ΔE 0.049
- Dusky Blue #475F94 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.056
Use #3D509E 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.