#558DD3
Closest named color: Dark Sky Blue (#448EE4). oklch(63.6% 0.122 254.8), rgb(85, 141, 211).
Aa
Black text reads best on this color (6.13:1).
About this color
#558DD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.122 and its hue 255°. 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 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #558DD3 |
| RGB | rgb(85, 141, 211) |
| HSL | hsl(213, 59%, 58%) |
| OKLCH | oklch(63.6% 0.122 254.8) |
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 #558DD3 | 3.42:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #558DD3 | 6.13:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #558DD3 text on white | 3.42:1 | AA large text | Lc 61.5 | Content text, not long reading |
| #558DD3 text on black | 6.13:1 | AA | Lc -40.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#78A3DB
oklch(70.6% 0.095 255.3)
-
Step 500
500 (this color)
#558DD3
oklch(63.6% 0.122 254.8)
-
Step 600
600
#3774BF
oklch(55.6% 0.133 255.1)
-
Step 700
700
#2961A4
oklch(49% 0.123 254.8)
-
Step 800
800
#235085
oklch(42.8% 0.101 254.3)
-
Step 900
900
#22426B
oklch(37.6% 0.08 255.5)
-
Step 950
950
#15273E
oklch(27% 0.049 255.2)
#558DD3 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) | #7091D6 | 0.033 |
| Deuteranopia (no green cones) | #5F85D2 | 0.022 |
| Tritanopia (no blue cones) | #009DA6 | 0.103 |
| Achromatopsia (no color) | #8B8B8B | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558DD3
#558DD3
oklch(63.6% 0.122 254.8)
- #B67F24
#B67F24
oklch(63.7% 0.122 74.8)
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 #558DD3, 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 0.038
- Chefchaouen Blue #4895EF ΔE 0.043
- Soft Blue #6488EA ΔE 0.043
- Cornflower Blue #6495ED ΔE 0.046
- Cool Blue #4984B8 ΔE 0.047
- Water Blue #0E87CC ΔE 0.050
- Steel Blue #4682B4 ΔE 0.056
Use #558DD3 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.