#558FD4
Closest named color: Dark Sky Blue (#448EE4). oklch(64.1% 0.121 253.8), rgb(85, 143, 212).
Aa
Black text reads best on this color (6.26:1).
About this color
#558FD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.121 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.028 away. Black text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #558FD4 |
| RGB | rgb(85, 143, 212) |
| HSL | hsl(213, 60%, 58%) |
| OKLCH | oklch(64.1% 0.121 253.8) |
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 #558FD4 | 3.35:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #558FD4 | 6.26:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #558FD4 text on white | 3.35:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #558FD4 text on black | 6.26:1 | AA | Lc -40.9 | 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
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#77A4DB
oklch(70.8% 0.095 253.9)
-
Step 500
500 (this color)
#558FD4
oklch(64.1% 0.121 253.8)
-
Step 600
600
#3575BE
oklch(55.7% 0.131 253.7)
-
Step 700
700
#2762A4
oklch(49.2% 0.122 253.6)
-
Step 800
800
#225085
oklch(42.7% 0.102 253.9)
-
Step 900
900
#21436A
oklch(37.7% 0.078 253.3)
-
Step 950
950
#14273E
oklch(26.9% 0.05 254.1)
#558FD4 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) | #7293D7 | 0.035 |
| Deuteranopia (no green cones) | #6187D3 | 0.023 |
| Tritanopia (no blue cones) | #009FA8 | 0.101 |
| Achromatopsia (no color) | #8C8C8C | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558FD4
#558FD4
oklch(64.1% 0.121 253.8)
- #B88028
#B88028
oklch(64.2% 0.121 73.9)
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 #558FD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.028
- Faded Blue #658CBB ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.041
- Cornflower Blue #6495ED ΔE 0.043
- Soft Blue #6488EA ΔE 0.044
- Cool Blue #4984B8 ΔE 0.051
- Water Blue #0E87CC ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.059
Use #558FD4 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.