#3A3977
Closest named color: Dark Slate Blue (#483D8B). oklch(38% 0.103 281), rgb(58, 57, 119).
Aa
White text reads best on this color (10.33:1).
About this color
#3A3977 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.103 and its hue 281°. 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 10.33:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #3A3977 |
| RGB | rgb(58, 57, 119) |
| HSL | hsl(241, 35%, 35%) |
| OKLCH | oklch(38% 0.103 281) |
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 #3A3977 | 10.33:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #3A3977 | 2.03:1 | Fails | Lc 10.1 | Not readable |
| #3A3977 text on white | 10.33:1 | AAA | Lc 93.8 | Preferred for body text |
| #3A3977 text on black | 2.03:1 | Fails | Lc -8.7 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D3D6F6
oklch(88.4% 0.044 281.2)
-
Step 300
300
#B7BBF2
oklch(80.8% 0.078 281.3)
-
Step 400
400
#9397EC
oklch(70.8% 0.123 280.7)
-
Step 500
500
#7B7AE6
oklch(63.1% 0.159 281.3)
-
Step 600
600
#6561D4
oklch(55.7% 0.172 280.8)
-
Step 700
700
#544FB7
oklch(49% 0.159 280.9)
-
Step 800
800
#454194
oklch(42.6% 0.132 281.4)
-
Step 900
900 (this color)
#3A3977
oklch(38% 0.103 281)
-
Step 950
950
#212145
oklch(26.8% 0.066 281)
#3A3977 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) | #1C4379 | 0.043 |
| Deuteranopia (no green cones) | #173E76 | 0.043 |
| Tritanopia (no blue cones) | #234652 | 0.089 |
| Achromatopsia (no color) | #404040 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3977
#3A3977
oklch(38% 0.103 281)
- #4C4300
#4C4300
oklch(38% 0.079 100.7)
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 #3A3977, 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
- Twilight Blue #0A437A ΔE 0.052
- Blueberry #464196 ΔE 0.058
- Cobalt #1E488F ΔE 0.059
- Marine Blue #01386A ΔE 0.065
- Light Navy #155084 ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.072
Use #3A3977 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.