#357AC4
Closest named color: Windows Blue (#3778BF). oklch(57.2% 0.134 252.6), rgb(53, 122, 196).
Aa
Black text reads best on this color (4.73:1).
About this color
#357AC4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.134 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.009 away. Black text reads best on it, at 4.73:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #357AC4 |
| RGB | rgb(53, 122, 196) |
| HSL | hsl(211, 57%, 49%) |
| OKLCH | oklch(57.2% 0.134 252.6) |
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 #357AC4 | 4.43:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #357AC4 | 4.73:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #357AC4 text on white | 4.43:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #357AC4 text on black | 4.73:1 | AA | Lc -31.2 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E7
oklch(80.9% 0.06 251.7)
-
Step 400
400
#74A4DB
oklch(70.6% 0.096 252.5)
-
Step 500
500
#4E8CD2
oklch(63% 0.124 252.9)
-
Step 600
600 (this color)
#357AC4
oklch(57.2% 0.134 252.6)
-
Step 700
700
#2262A5
oklch(49.1% 0.125 252.7)
-
Step 800
800
#1E5085
oklch(42.6% 0.103 252.6)
-
Step 900
900
#1F436B
oklch(37.7% 0.08 252.8)
-
Step 950
950
#13273F
oklch(26.9% 0.052 254)
#357AC4 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) | #587FC7 | 0.038 |
| Deuteranopia (no green cones) | #4272C3 | 0.023 |
| Tritanopia (no blue cones) | #008B95 | 0.102 |
| Achromatopsia (no color) | #787878 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #357AC4
#357AC4
oklch(57.2% 0.134 252.6)
- #A36A00
#A36A00
oklch(57.1% 0.122 72.4)
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 #357AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.009
- Water Blue #0E87CC ΔE 0.036
- Nice Blue #107AB0 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.044
- French Blue #436BAD ΔE 0.049
- Mid Blue #276AB3 ΔE 0.052
Use #357AC4 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.