#424FC8
Closest named color: Warm Blue (#4B57DB). oklch(49.1% 0.186 272.8), rgb(66, 79, 200).
Aa
White text reads best on this color (6.59:1).
About this color
#424FC8 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.186 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.038 away. White text reads best on it, at 6.59:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.18:1 |
| White text | 6.59:1 |
Values
| HEX | #424FC8 |
| RGB | rgb(66, 79, 200) |
| HSL | hsl(234, 55%, 52%) |
| OKLCH | oklch(49.1% 0.186 272.8) |
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 #424FC8 | 6.59:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #424FC8 | 3.18:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #424FC8 text on white | 6.59:1 | AA | Lc 82.1 | Fine for body text |
| #424FC8 text on black | 3.18:1 | AA large text | Lc -19.8 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#ADBDFC
oklch(80.9% 0.091 273.2)
-
Step 400
400
#8399FA
oklch(70.8% 0.144 272.6)
-
Step 500
500
#677CF7
oklch(63.2% 0.184 272.8)
-
Step 600
600
#5161E6
oklch(55.7% 0.2 272.9)
-
Step 700
700 (this color)
#424FC8
oklch(49.1% 0.186 272.8)
-
Step 800
800
#3642A2
oklch(42.8% 0.154 272.7)
-
Step 900
900
#2E3980
oklch(37.7% 0.12 272.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#424FC8 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) | #0063CC | 0.057 |
| Deuteranopia (no green cones) | #0057C6 | 0.045 |
| Tritanopia (no blue cones) | #006D84 | 0.152 |
| Achromatopsia (no color) | #5D5D5D | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424FC8
#424FC8
oklch(49.1% 0.186 272.8)
- #755E00
#755E00
oklch(49.1% 0.1 92.1)
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 #424FC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.038
- Blue With A Hint Of Purple #533CC6 ΔE 0.043
- Blurple #5539CC ΔE 0.049
- Blue Blue #2242C7 ΔE 0.050
- Majorelle Blue #3F37C9 ΔE 0.050
- Bluey Purple #6241C7 ΔE 0.053
- Iris #6258C4 ΔE 0.054
- Azul #1D5DEC ΔE 0.067
Use #424FC8 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.