#3F53CF
Closest named color: Warm Blue (#4B57DB). oklch(50.3% 0.192 270.8), rgb(63, 83, 207).
Aa
White text reads best on this color (6.26:1).
About this color
#3F53CF is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.192 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.027 away. White text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.34:1 |
| White text | 6.26:1 |
Values
| HEX | #3F53CF |
| RGB | rgb(63, 83, 207) |
| HSL | hsl(232, 60%, 53%) |
| OKLCH | oklch(50.3% 0.192 270.8) |
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 #3F53CF | 6.26:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #3F53CF | 3.34:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #3F53CF text on white | 6.26:1 | AA | Lc 80.7 | Fine for body text |
| #3F53CF text on black | 3.34:1 | AA large text | Lc -21.2 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFD
oklch(80.9% 0.092 270.6)
-
Step 400
400
#7F99FD
oklch(70.7% 0.149 271.2)
-
Step 500
500
#617CFA
oklch(63.1% 0.189 271)
-
Step 600
600
#4A61E9
oklch(55.5% 0.206 270.8)
-
Step 700
700 (this color)
#3F53CF
oklch(50.3% 0.192 270.8)
-
Step 800
800
#3142A4
oklch(42.7% 0.158 270.7)
-
Step 900
900
#2A3982
oklch(37.6% 0.124 270.6)
-
Step 950
950
#19224C
oklch(27% 0.078 271.2)
#3F53CF 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) | #0067D3 | 0.054 |
| Deuteranopia (no green cones) | #005ACD | 0.040 |
| Tritanopia (no blue cones) | #007289 | 0.154 |
| Achromatopsia (no color) | #606060 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F53CF
#3F53CF
oklch(50.3% 0.192 270.8)
- #7A6100
#7A6100
oklch(50.3% 0.103 91.1)
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 #3F53CF, closest first.
No curated palette has a color within ΔE 0.04 of #3F53CF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.027
- Azul #1D5DEC ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Iris #6258C4 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.055
- Blurple #5539CC ΔE 0.057
- Neon Blue #4361EE ΔE 0.058
- Royal Blue #4169E1 ΔE 0.059
Use #3F53CF 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.