#603D77
Closest named color: Dark Slate Blue (#483D8B). oklch(42.6% 0.1 310.6), rgb(96, 61, 119).
Aa
White text reads best on this color (8.63:1).
About this color
#603D77 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.100 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.055 away. White text reads best on it, at 8.63:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #603D77 |
| RGB | rgb(96, 61, 119) |
| HSL | hsl(276, 32%, 35%) |
| OKLCH | oklch(42.6% 0.1 310.6) |
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 #603D77 | 8.63:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #603D77 | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #603D77 text on white | 8.63:1 | AAA | Lc 89.5 | Fine for body text |
| #603D77 text on black | 2.43:1 | Fails | Lc -12.8 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F2
oklch(93.6% 0.016 310.1)
-
Step 200
200
#E0D4EA
oklch(88.6% 0.032 309.9)
-
Step 300
300
#CDB7DD
oklch(81% 0.058 311)
-
Step 400
400
#B390CC
oklch(70.7% 0.094 310.6)
-
Step 500
500
#A073BF
oklch(63% 0.121 310.5)
-
Step 600
600
#8B5BAB
oklch(55.6% 0.13 310.5)
-
Step 700
700
#764A93
oklch(49.1% 0.121 310.5)
-
Step 800
800 (this color)
#603D77
oklch(42.6% 0.1 310.6)
-
Step 900
900
#4F3560
oklch(37.8% 0.078 311)
-
Step 950
950
#2E1F38
oklch(27% 0.049 310.9)
#603D77 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) | #304A79 | 0.080 |
| Deuteranopia (no green cones) | #394C75 | 0.073 |
| Tritanopia (no blue cones) | #5D4654 | 0.071 |
| Achromatopsia (no color) | #4C4C4C | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #603D77
#603D77
oklch(42.6% 0.1 310.6)
- #3B5916
#3B5916
oklch(42.5% 0.1 130.6)
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 #603D77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Twilight #4E518B ΔE 0.062
- Rebecca Purple #663399 ΔE 0.064
- Dusk #4E5481 ΔE 0.066
- Blueberry #464196 ΔE 0.068
- Dusty Grape #545775 ΔE 0.075
- Light Eggplant #894585 ΔE 0.085
- Brownish Purple #76424E ΔE 0.086
Use #603D77 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.