#557EDC
Closest named color: Soft Blue (#6488EA). oklch(60.9% 0.15 264.6), rgb(85, 126, 220).
Aa
Black text reads best on this color (5.40:1).
About this color
#557EDC is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.150 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.038 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #557EDC |
| RGB | rgb(85, 126, 220) |
| HSL | hsl(222, 66%, 60%) |
| OKLCH | oklch(60.9% 0.15 264.6) |
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 #557EDC | 3.88:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #557EDC | 5.40:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #557EDC text on white | 3.88:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #557EDC text on black | 5.40:1 | AA | Lc -35.6 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C1F1
oklch(81% 0.073 264)
-
Step 400
400
#7C9FEA
oklch(70.7% 0.117 264.5)
-
Step 500
500 (this color)
#557EDC
oklch(60.9% 0.15 264.6)
-
Step 600
600
#426CD2
oklch(55.6% 0.164 264.8)
-
Step 700
700
#345AB5
oklch(49.1% 0.151 264.5)
-
Step 800
800
#2B4A93
oklch(42.7% 0.126 264.4)
-
Step 900
900
#273E75
oklch(37.6% 0.098 265)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#557EDC 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) | #5388E0 | 0.026 |
| Deuteranopia (no green cones) | #3F7BDA | 0.024 |
| Tritanopia (no blue cones) | #0093A2 | 0.128 |
| Achromatopsia (no color) | #818181 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557EDC
#557EDC
oklch(60.9% 0.15 264.6)
- #A57B00
#A57B00
oklch(60.8% 0.125 84.5)
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 #557EDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.042
- Cornflower #6A79F7 ΔE 0.051
- Windows Blue #3778BF ΔE 0.057
- Water Blue #0E87CC ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.062
- Royal Blue #4169E1 ΔE 0.062
- Cool Blue #4984B8 ΔE 0.063
Use #557EDC 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.