#0583D4
Closest named color: Water Blue (#0E87CC). oklch(59.3% 0.155 247), rgb(5, 131, 212).
Aa
Black text reads best on this color (5.20:1).
About this color
#0583D4 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.155 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.018 away. Black text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.20:1 |
| White text | 4.03:1 |
Values
| HEX | #0583D4 |
| RGB | rgb(5, 131, 212) |
| HSL | hsl(203, 95%, 43%) |
| OKLCH | oklch(59.3% 0.155 247) |
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 #0583D4 | 4.03:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #0583D4 | 5.20:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #0583D4 text on white | 4.03:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #0583D4 text on black | 5.20:1 | AA | Lc -34.7 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9DC6EC
oklch(81% 0.069 246.7)
-
Step 400
400
#64A7E2
oklch(70.8% 0.111 246.7)
-
Step 500
500
#318FDA
oklch(63.1% 0.142 247)
-
Step 600
600 (this color)
#0583D4
oklch(59.3% 0.155 247)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#094470
oklch(37.6% 0.094 247.4)
-
Step 950
950
#0A2841
oklch(26.9% 0.058 247.4)
#0583D4 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) | #5B87D7 | 0.055 |
| Deuteranopia (no green cones) | #3C77D2 | 0.036 |
| Tritanopia (no blue cones) | #0097A1 | 0.110 |
| Achromatopsia (no color) | #7E7E7E | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0583D4
#0583D4
oklch(59.3% 0.155 247)
- #B16C00
#B16C00
oklch(59.3% 0.131 67)
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 #0583D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.018
- Windows Blue #3778BF ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.051
- Cool Blue #4984B8 ΔE 0.054
- Steel Blue #4682B4 ΔE 0.056
- Nice Blue #107AB0 ΔE 0.057
- Blue NCS #118AB2 ΔE 0.061
- Clear Blue #247AFD ΔE 0.070
Use #0583D4 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.