#3F4DBE
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(47.8% 0.176 272.5), rgb(63, 77, 190).
Aa
White text reads best on this color (6.96:1).
About this color
#3F4DBE is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.176 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.044 away. White text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 3.01:1 |
| White text | 6.96:1 |
Values
| HEX | #3F4DBE |
| RGB | rgb(63, 77, 190) |
| HSL | hsl(233, 50%, 50%) |
| OKLCH | oklch(47.8% 0.176 272.5) |
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 #3F4DBE | 6.96:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #3F4DBE | 3.01:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #3F4DBE text on white | 6.96:1 | AA | Lc 83.6 | Fine for body text |
| #3F4DBE text on black | 3.01:1 | AA large text | Lc -18.3 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#ADBEF8
oklch(80.9% 0.084 271.8)
-
Step 400
400
#849AF5
oklch(70.8% 0.136 272.2)
-
Step 500
500
#677DF1
oklch(63% 0.174 272.4)
-
Step 600
600
#5163E0
oklch(55.6% 0.19 272.5)
-
Step 700
700 (this color)
#3F4DBE
oklch(47.8% 0.176 272.5)
-
Step 800
800
#36439D
oklch(42.6% 0.146 272.4)
-
Step 900
900
#2E3A7D
oklch(37.7% 0.114 272.2)
-
Step 950
950
#1B2249
oklch(26.9% 0.072 272.9)
#3F4DBE 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) | #005FC2 | 0.053 |
| Deuteranopia (no green cones) | #0054BC | 0.044 |
| Tritanopia (no blue cones) | #00697E | 0.144 |
| Achromatopsia (no color) | #595959 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4DBE
#3F4DBE
oklch(47.8% 0.176 272.5)
- #705B00
#705B00
oklch(47.8% 0.098 93.2)
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 #3F4DBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue With A Hint Of Purple #533CC6 ΔE 0.044
- Blue Blue #2242C7 ΔE 0.045
- Majorelle Blue #3F37C9 ΔE 0.048
- Blurple #5539CC ΔE 0.052
- Warm Blue #4B57DB ΔE 0.054
- Bluey Purple #6241C7 ΔE 0.057
- Iris #6258C4 ΔE 0.061
- Blueberry #464196 ΔE 0.069
Use #3F4DBE 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.