#0558CA
Closest named color: Blue Blue (#2242C7). oklch(49.1% 0.191 259.5), rgb(5, 88, 202).
Aa
White text reads best on this color (6.45:1).
About this color
#0558CA is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.191 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 6.45:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #0558CA |
| RGB | rgb(5, 88, 202) |
| HSL | hsl(215, 95%, 41%) |
| OKLCH | oklch(49.1% 0.191 259.5) |
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 #0558CA | 6.45:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #0558CA | 3.25:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #0558CA text on white | 6.45:1 | AA | Lc 81.2 | Fine for body text |
| #0558CA text on black | 3.25:1 | AA large text | Lc -20.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400
#67A0FC
oklch(70.7% 0.148 259.6)
-
Step 500
500
#3C85F9
oklch(63.2% 0.188 259.4)
-
Step 600
600
#166BE8
oklch(55.7% 0.205 259.4)
-
Step 700
700 (this color)
#0558CA
oklch(49.1% 0.191 259.5)
-
Step 800
800
#0B49A3
oklch(42.7% 0.157 259.3)
-
Step 900
900
#133E81
oklch(37.6% 0.123 259.4)
-
Step 950
950
#0D254C
oklch(27% 0.078 259.7)
#0558CA 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) | #0067CE | 0.038 |
| Deuteranopia (no green cones) | #0056C8 | 0.006 |
| Tritanopia (no blue cones) | #007588 | 0.145 |
| Achromatopsia (no color) | #5E5E5E | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0558CA
#0558CA
oklch(49.1% 0.191 259.5)
- #7F5900
#7F5900
oklch(49.2% 0.102 79.8)
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 #0558CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Azul #1D5DEC ΔE 0.056
- Warm Blue #4B57DB ΔE 0.060
- Mid Blue #276AB3 ΔE 0.067
- Royal Blue #4169E1 ΔE 0.072
- Majorelle Blue #3F37C9 ΔE 0.074
- Neon Blue #4361EE ΔE 0.077
- Cerulean Blue #056EEE ΔE 0.077
Use #0558CA 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.