#4F51D8
Closest named color: Warm Blue (#4B57DB). oklch(51.6% 0.202 276.1), rgb(79, 81, 216).
Aa
White text reads best on this color (5.99:1).
About this color
#4F51D8 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.202 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.014 away. White text reads best on it, at 5.99:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.202) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.50:1 |
| White text | 5.99:1 |
Values
| HEX | #4F51D8 |
| RGB | rgb(79, 81, 216) |
| HSL | hsl(239, 64%, 58%) |
| OKLCH | oklch(51.6% 0.202 276.1) |
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 #4F51D8 | 5.99:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #4F51D8 | 3.50:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #4F51D8 text on white | 5.99:1 | AA | Lc 79.4 | Fine for body text |
| #4F51D8 text on black | 3.50:1 | AA large text | Lc -22.4 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CFD7FE
oklch(88.6% 0.054 276.1)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8896FF
oklch(70.8% 0.153 276)
-
Step 500
500
#6D76FF
oklch(63% 0.2 276.2)
-
Step 600
600
#585AEE
oklch(55.5% 0.217 276.1)
-
Step 700
700 (this color)
#4F51D8
oklch(51.6% 0.202 276.1)
-
Step 800
800
#3B3DA7
oklch(42.7% 0.166 275.9)
-
Step 900
900
#323685
oklch(37.8% 0.13 276)
-
Step 950
950
#1D204E
oklch(27% 0.083 276.5)
#4F51D8 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) | #0069DC | 0.069 |
| Deuteranopia (no green cones) | #005DD5 | 0.059 |
| Tritanopia (no blue cones) | #00738D | 0.167 |
| Achromatopsia (no color) | #636363 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F51D8
#4F51D8
oklch(51.6% 0.202 276.1)
- #7A6700
#7A6700
oklch(51.7% 0.106 96.4)
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 #4F51D8, closest first.
No curated palette has a color within ΔE 0.04 of #4F51D8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.014
- Iris #6258C4 ΔE 0.047
- Neon Blue #4361EE ΔE 0.049
- Bluey Purple #6241C7 ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.051
- Blurple #5539CC ΔE 0.051
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
Use #4F51D8 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.