#558ECF
Closest named color: Faded Blue (#658CBB). oklch(63.6% 0.115 252.9), rgb(85, 142, 207).
Aa
Black text reads best on this color (6.15:1).
About this color
#558ECF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.115 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.032 away. Black text reads best on it, at 6.15:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.15:1 |
| White text | 3.41:1 |
Values
| HEX | #558ECF |
| RGB | rgb(85, 142, 207) |
| HSL | hsl(212, 56%, 57%) |
| OKLCH | oklch(63.6% 0.115 252.9) |
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 #558ECF | 3.41:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #558ECF | 6.15:1 | AA | Lc 42.6 | Non-text elements, placeholder text |
| #558ECF text on white | 3.41:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #558ECF text on black | 6.15:1 | AA | Lc -40.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A7C3E5
oklch(80.8% 0.057 253.4)
-
Step 400
400
#78A4D8
oklch(70.7% 0.09 253.1)
-
Step 500
500 (this color)
#558ECF
oklch(63.6% 0.115 252.9)
-
Step 600
600
#3775BA
oklch(55.5% 0.125 253.1)
-
Step 700
700
#2962A1
oklch(49.1% 0.117 253.2)
-
Step 800
800
#235082
oklch(42.6% 0.097 253.1)
-
Step 900
900
#224368
oklch(37.7% 0.075 252.8)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#558ECF 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) | #7391D2 | 0.036 |
| Deuteranopia (no green cones) | #6386CE | 0.024 |
| Tritanopia (no blue cones) | #009DA5 | 0.098 |
| Achromatopsia (no color) | #8B8B8B | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558ECF
#558ECF
oklch(63.6% 0.115 252.9)
- #B57F2F
#B57F2F
oklch(63.7% 0.115 73.2)
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 #558ECF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.034
- Cool Blue #4984B8 ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.048
- Soft Blue #6488EA ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.050
- Water Blue #0E87CC ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.051
Use #558ECF 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.