#3D37B3
Closest named color: Majorelle Blue (#3F37C9). oklch(42.9% 0.189 277), rgb(61, 55, 179).
Aa
White text reads best on this color (8.76:1).
About this color
#3D37B3 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.189 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.035 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #3D37B3 |
| RGB | rgb(61, 55, 179) |
| HSL | hsl(243, 53%, 46%) |
| OKLCH | oklch(42.9% 0.189 277) |
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 #3D37B3 | 8.76:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #3D37B3 | 2.39:1 | Fails | Lc 14.7 | Not readable |
| #3D37B3 text on white | 8.76:1 | AAA | Lc 89.3 | Fine for body text |
| #3D37B3 text on black | 2.39:1 | Fails | Lc -12.9 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CFD6FF
oklch(88.4% 0.057 277.5)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8995FF
oklch(70.7% 0.154 276.8)
-
Step 500
500
#6F76FF
oklch(63.2% 0.2 276.8)
-
Step 600
600
#5A51FD
oklch(55.6% 0.245 277.2)
-
Step 700
700
#4B40DD
oklch(49.2% 0.228 277.1)
-
Step 800
800 (this color)
#3D37B3
oklch(42.9% 0.189 277)
-
Step 900
900
#32328D
oklch(37.8% 0.147 276.7)
-
Step 950
950
#1D1E52
oklch(26.9% 0.093 277.3)
#3D37B3 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) | #0050B7 | 0.065 |
| Deuteranopia (no green cones) | #0045B1 | 0.053 |
| Tritanopia (no blue cones) | #005871 | 0.152 |
| Achromatopsia (no color) | #4B4B4B | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D37B3
#3D37B3
oklch(42.9% 0.189 277)
- #5D4F00
#5D4F00
oklch(42.9% 0.088 97.4)
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 #3D37B3, closest first.
No curated palette has a color within ΔE 0.04 of #3D37B3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.035
- Sapphire #2138AB ΔE 0.037
- Blue Blue #2242C7 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Indigo Blue #3A18B1 ΔE 0.050
- Blueberry #464196 ΔE 0.055
- Blurple #5539CC ΔE 0.056
- Violet Blue #510AC9 ΔE 0.063
Use #3D37B3 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.