#3736B9
Closest named color: Majorelle Blue (#3F37C9). oklch(42.9% 0.199 274.4), rgb(55, 54, 185).
Aa
White text reads best on this color (8.78:1).
About this color
#3736B9 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.199 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.028 away. White text reads best on it, at 8.78:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 2.39:1 |
| White text | 8.78:1 |
Values
| HEX | #3736B9 |
| RGB | rgb(55, 54, 185) |
| HSL | hsl(240, 55%, 47%) |
| OKLCH | oklch(42.9% 0.199 274.4) |
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 #3736B9 | 8.78:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #3736B9 | 2.39:1 | Fails | Lc 14.7 | Not readable |
| #3736B9 text on white | 8.78:1 | AAA | Lc 89.3 | Fine for body text |
| #3736B9 text on black | 2.39:1 | Fails | Lc -13.0 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FF
oklch(70.8% 0.153 274.4)
-
Step 500
500
#6978FF
oklch(63.1% 0.199 274.4)
-
Step 600
600
#5254FF
oklch(55.7% 0.246 274.4)
-
Step 700
700
#433EE4
oklch(49.1% 0.24 274.3)
-
Step 800
800 (this color)
#3736B9
oklch(42.9% 0.199 274.4)
-
Step 900
900
#2E3191
oklch(37.7% 0.155 274.7)
-
Step 950
950
#1A1E55
oklch(26.9% 0.098 274.5)
#3736B9 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) | #0051BD | 0.064 |
| Deuteranopia (no green cones) | #0044B7 | 0.045 |
| Tritanopia (no blue cones) | #005A74 | 0.157 |
| Achromatopsia (no color) | #4B4B4B | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3736B9
#3736B9
oklch(42.9% 0.199 274.4)
- #5F4E00
#5F4E00
oklch(42.9% 0.088 94.5)
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 #3736B9, closest first.
No curated palette has a color within ΔE 0.04 of #3736B9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.028
- Sapphire #2138AB ΔE 0.034
- Blue Blue #2242C7 ΔE 0.038
- Indigo Blue #3A18B1 ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Blurple #5539CC ΔE 0.057
- Violet Blue #510AC9 ΔE 0.062
- Blueberry #464196 ΔE 0.067
Use #3736B9 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.