#3D477C
Closest named color: Dark Slate Blue (#483D8B). oklch(41.6% 0.089 273.8), rgb(61, 71, 124).
Aa
White text reads best on this color (8.78:1).
About this color
#3D477C is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.089 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 8.78:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.39:1 |
| White text | 8.78:1 |
Values
| HEX | #3D477C |
| RGB | rgb(61, 71, 124) |
| HSL | hsl(230, 34%, 36%) |
| OKLCH | oklch(41.6% 0.089 273.8) |
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 #3D477C | 8.78:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #3D477C | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #3D477C text on white | 8.78:1 | AAA | Lc 90.0 | Fine for body text |
| #3D477C text on black | 2.39:1 | Fails | Lc -12.3 | Not readable |
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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8ED
oklch(88.5% 0.029 275.1)
-
Step 300
300
#B6BFE3
oklch(81% 0.052 274.2)
-
Step 400
400
#909DD5
oklch(70.7% 0.083 274)
-
Step 500
500
#7584CA
oklch(63.1% 0.107 273.8)
-
Step 600
600
#5E6DB7
oklch(55.7% 0.116 273.4)
-
Step 700
700
#4E5A9D
oklch(49% 0.108 274.1)
-
Step 800
800 (this color)
#3D477C
oklch(41.6% 0.089 273.8)
-
Step 900
900
#363E66
oklch(37.6% 0.069 274)
-
Step 950
950
#20253C
oklch(27.1% 0.043 273.8)
#3D477C 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) | #324D7E | 0.021 |
| Deuteranopia (no green cones) | #2C487B | 0.022 |
| Tritanopia (no blue cones) | #24525B | 0.079 |
| Achromatopsia (no color) | #4B4B4B | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D477C
#3D477C
oklch(41.6% 0.089 273.8)
- #5B4A00
#5B4A00
oklch(41.5% 0.085 93.8)
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 #3D477C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Light Navy #155084 ΔE 0.044
- Dusk Blue #26538D ΔE 0.044
- Cobalt #1E488F ΔE 0.045
- Twilight #4E518B ΔE 0.045
- Dusk #4E5481 ΔE 0.048
- Blueberry #464196 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.054
Use #3D477C 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.