#43307F
Closest named color: Dark Slate Blue (#483D8B). oklch(37.7% 0.128 290), rgb(67, 48, 127).
Aa
White text reads best on this color (10.67:1).
About this color
#43307F is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.128 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.039 away. White text reads best on it, at 10.67:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.96:1 |
| White text | 10.67:1 |
Values
| HEX | #43307F |
| RGB | rgb(67, 48, 127) |
| HSL | hsl(254, 45%, 34%) |
| OKLCH | oklch(37.7% 0.128 290) |
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 #43307F | 10.67:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #43307F | 1.96:1 | Fails | Lc 9.5 | Not readable |
| #43307F text on white | 10.67:1 | AAA | Lc 94.4 | Preferred for body text |
| #43307F text on black | 1.96:1 | Fails | Lc -8.2 | 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 900.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D8D4FB
oklch(88.5% 0.053 290)
-
Step 300
300
#BFB6FB
oklch(80.8% 0.097 290)
-
Step 400
400
#A08EF8
oklch(70.7% 0.152 289.7)
-
Step 500
500
#8B6DF5
oklch(63.1% 0.195 289.8)
-
Step 600
600
#7750E4
oklch(55.6% 0.212 289.8)
-
Step 700
700
#653FC6
oklch(49.1% 0.198 290.1)
-
Step 800
800
#5235A0
oklch(42.7% 0.164 290.1)
-
Step 900
900 (this color)
#43307F
oklch(37.7% 0.128 290)
-
Step 950
950
#271D4A
oklch(27% 0.08 290.2)
#43307F 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) | #004082 | 0.076 |
| Deuteranopia (no green cones) | #003C7D | 0.075 |
| Tritanopia (no blue cones) | #314252 | 0.105 |
| Achromatopsia (no color) | #3E3E3E | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43307F
#43307F
oklch(37.7% 0.128 290)
- #454500
#454500
oklch(37.8% 0.082 109.8)
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 #43307F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.039
- Blueberry #464196 ΔE 0.055
- Indigo #4B0082 ΔE 0.071
- Cobalt #1E488F ΔE 0.075
- Twilight Blue #0A437A ΔE 0.078
- Rebecca Purple #663399 ΔE 0.079
- Imperial Purple #480CA8 ΔE 0.082
- Royal Purple #4B006E ΔE 0.083
Use #43307F 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.