#357EDB
Closest named color: Water Blue (#0E87CC). oklch(59.5% 0.159 256), rgb(53, 126, 219).
Aa
Black text reads best on this color (5.15:1).
About this color
#357EDB is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.159 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.040 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #357EDB |
| RGB | rgb(53, 126, 219) |
| HSL | hsl(214, 70%, 53%) |
| OKLCH | oklch(59.5% 0.159 256) |
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 #357EDB | 4.07:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #357EDB | 5.15:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #357EDB text on white | 4.07:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #357EDB text on black | 5.15:1 | AA | Lc -34.2 | 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 500.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6BA3ED
oklch(70.8% 0.124 255.8)
-
Step 500
500 (this color)
#357EDB
oklch(59.5% 0.159 256)
-
Step 600
600
#1C71D5
oklch(55.6% 0.172 256)
-
Step 700
700
#0C5EB9
oklch(49.1% 0.161 256)
-
Step 800
800
#104D96
oklch(42.7% 0.134 256.2)
-
Step 900
900
#164177
oklch(37.7% 0.104 256)
-
Step 950
950
#0E2646
oklch(26.9% 0.067 256.5)
#357EDB 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) | #5086DF | 0.034 |
| Deuteranopia (no green cones) | #3177D9 | 0.019 |
| Tritanopia (no blue cones) | #0094A2 | 0.122 |
| Achromatopsia (no color) | #7E7E7E | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #357EDB
#357EDB
oklch(59.5% 0.159 256)
- #A97200
#A97200
oklch(59.5% 0.125 75.4)
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 #357EDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.040
- Windows Blue #3778BF ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.047
- Clear Blue #247AFD ΔE 0.054
- Royal Blue #4169E1 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.059
- Soft Blue #6488EA ΔE 0.059
- Cool Blue #4984B8 ΔE 0.062
Use #357EDB 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.