#4255D7
Closest named color: Warm Blue (#4B57DB). oklch(51.5% 0.199 271.2), rgb(66, 85, 215).
Aa
White text reads best on this color (5.97:1).
About this color
#4255D7 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.199 and its hue 271°. 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 5.97:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #4255D7 |
| RGB | rgb(66, 85, 215) |
| HSL | hsl(232, 65%, 55%) |
| OKLCH | oklch(51.5% 0.199 271.2) |
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 #4255D7 | 5.97:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #4255D7 | 3.51:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #4255D7 text on white | 5.97:1 | AA | Lc 79.3 | Fine for body text |
| #4255D7 text on black | 3.51:1 | AA large text | Lc -22.5 | 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
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CCD8FD
oklch(88.5% 0.053 271.1)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFE
oklch(63.1% 0.196 271)
-
Step 600
600
#4A5FEE
oklch(55.6% 0.215 271.2)
-
Step 700
700 (this color)
#4255D7
oklch(51.5% 0.199 271.2)
-
Step 800
800
#3140A7
oklch(42.6% 0.165 271.2)
-
Step 900
900
#2A3884
oklch(37.6% 0.128 271)
-
Step 950
950
#19224D
oklch(27.1% 0.08 271.2)
#4255D7 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) | #006ADB | 0.056 |
| Deuteranopia (no green cones) | #005DD4 | 0.042 |
| Tritanopia (no blue cones) | #00768E | 0.160 |
| Achromatopsia (no color) | #636363 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4255D7
#4255D7
oklch(51.5% 0.199 271.2)
- #7E6400
#7E6400
oklch(51.4% 0.105 90.9)
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 #4255D7, closest first.
No curated palette has a color within ΔE 0.04 of #4255D7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.014
- Azul #1D5DEC ΔE 0.044
- Neon Blue #4361EE ΔE 0.045
- Royal Blue #4169E1 ΔE 0.049
- Iris #6258C4 ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.061
Use #4255D7 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.