#4557CC
Closest named color: Warm Blue (#4B57DB). oklch(51.1% 0.181 271.8), rgb(69, 87, 204).
Aa
White text reads best on this color (6.02:1).
About this color
#4557CC is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.181 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.025 away. White text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #4557CC |
| RGB | rgb(69, 87, 204) |
| HSL | hsl(232, 57%, 54%) |
| OKLCH | oklch(51.1% 0.181 271.8) |
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 #4557CC | 6.02:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #4557CC | 3.48:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #4557CC text on white | 6.02:1 | AA | Lc 79.6 | Fine for body text |
| #4557CC text on black | 3.48:1 | AA large text | Lc -22.2 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEFA
oklch(80.9% 0.087 271.4)
-
Step 400
400
#829AF8
oklch(70.8% 0.14 271.6)
-
Step 500
500
#657DF4
oklch(63.1% 0.179 271.8)
-
Step 600
600
#4F63E3
oklch(55.7% 0.194 271.8)
-
Step 700
700 (this color)
#4557CC
oklch(51.1% 0.181 271.8)
-
Step 800
800
#34439F
oklch(42.7% 0.149 271.6)
-
Step 900
900
#2D3A7F
oklch(37.8% 0.117 271.7)
-
Step 950
950
#1A224A
oklch(26.9% 0.075 272)
#4557CC 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) | #0069D0 | 0.055 |
| Deuteranopia (no green cones) | #005DCA | 0.045 |
| Tritanopia (no blue cones) | #007489 | 0.150 |
| Achromatopsia (no color) | #636363 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4557CC
#4557CC
oklch(51.1% 0.181 271.8)
- #7C6300
#7C6300
oklch(51% 0.104 91.4)
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 #4557CC, closest first.
No curated palette has a color within ΔE 0.04 of #4557CC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.025
- Iris #6258C4 ΔE 0.043
- Royal Blue #4169E1 ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.054
- Neon Blue #4361EE ΔE 0.056
- Azul #1D5DEC ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
Use #4557CC 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.