#0581D7
Closest named color: Water Blue (#0E87CC). oklch(59% 0.16 248.7), rgb(5, 129, 215).
Aa
Black text reads best on this color (5.12:1).
About this color
#0581D7 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.160 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.026 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #0581D7 |
| RGB | rgb(5, 129, 215) |
| HSL | hsl(205, 95%, 43%) |
| OKLCH | oklch(59% 0.16 248.7) |
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 #0581D7 | 4.09:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #0581D7 | 5.12:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #0581D7 text on white | 4.09:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #0581D7 text on black | 5.12:1 | AA | Lc -34.2 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9DC5EE
oklch(80.9% 0.072 249.4)
-
Step 400
400
#64A6E5
oklch(70.7% 0.115 248.7)
-
Step 500
500
#318EDE
oklch(63.1% 0.148 248.8)
-
Step 600
600 (this color)
#0581D7
oklch(59% 0.16 248.7)
-
Step 700
700
#0063A8
oklch(49% 0.134 248.8)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#0A4472
oklch(37.8% 0.096 248.7)
-
Step 950
950
#0A2843
oklch(27% 0.061 249.3)
#0581D7 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) | #5686DA | 0.052 |
| Deuteranopia (no green cones) | #3476D5 | 0.031 |
| Tritanopia (no blue cones) | #0096A1 | 0.115 |
| Achromatopsia (no color) | #7D7D7D | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0581D7
#0581D7
oklch(59% 0.16 248.7)
- #AE6D00
#AE6D00
oklch(59.1% 0.129 69.1)
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 #0581D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.026
- Windows Blue #3778BF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.053
- Cool Blue #4984B8 ΔE 0.059
- Nice Blue #107AB0 ΔE 0.060
- Steel Blue #4682B4 ΔE 0.061
- Clear Blue #247AFD ΔE 0.063
- Cerulean Blue #056EEE ΔE 0.064
Use #0581D7 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.