#424FC5
Closest named color: Warm Blue (#4B57DB). oklch(48.9% 0.182 272.9), rgb(66, 79, 197).
Aa
White text reads best on this color (6.65:1).
About this color
#424FC5 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.182 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.041 away. White text reads best on it, at 6.65:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #424FC5 |
| RGB | rgb(66, 79, 197) |
| HSL | hsl(234, 53%, 52%) |
| OKLCH | oklch(48.9% 0.182 272.9) |
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 #424FC5 | 6.65:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #424FC5 | 3.15:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #424FC5 text on white | 6.65:1 | AA | Lc 82.4 | Fine for body text |
| #424FC5 text on black | 3.15:1 | AA large text | Lc -19.5 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FA
oklch(88.5% 0.048 272.4)
-
Step 300
300
#ADBDFA
oklch(80.8% 0.088 272.9)
-
Step 400
400
#8499F8
oklch(70.7% 0.141 272.9)
-
Step 500
500
#677CF5
oklch(63.1% 0.181 272.8)
-
Step 600
600
#5162E3
oklch(55.6% 0.195 272.7)
-
Step 700
700 (this color)
#424FC5
oklch(48.9% 0.182 272.9)
-
Step 800
800
#3642A0
oklch(42.7% 0.152 272.7)
-
Step 900
900
#2E397F
oklch(37.7% 0.118 272.7)
-
Step 950
950
#1B224A
oklch(27% 0.074 273)
#424FC5 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) | #0062C9 | 0.056 |
| Deuteranopia (no green cones) | #0057C3 | 0.046 |
| Tritanopia (no blue cones) | #006C82 | 0.150 |
| Achromatopsia (no color) | #5C5C5C | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424FC5
#424FC5
oklch(48.9% 0.182 272.9)
- #745E00
#745E00
oklch(49% 0.1 92.9)
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 #424FC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.041
- Blue With A Hint Of Purple #533CC6 ΔE 0.043
- Blurple #5539CC ΔE 0.050
- Blue Blue #2242C7 ΔE 0.050
- Majorelle Blue #3F37C9 ΔE 0.051
- Bluey Purple #6241C7 ΔE 0.053
- Iris #6258C4 ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.068
Use #424FC5 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.