#0587CA
Closest named color: Water Blue (#0E87CC). oklch(59.7% 0.139 241.6), rgb(5, 135, 202).
Aa
Black text reads best on this color (5.32:1).
About this color
#0587CA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.139 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.004 away. Black text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #0587CA |
| RGB | rgb(5, 135, 202) |
| HSL | hsl(200, 95%, 41%) |
| OKLCH | oklch(59.7% 0.139 241.6) |
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 #0587CA | 3.94:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #0587CA | 5.32:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #0587CA text on white | 3.94:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #0587CA text on black | 5.32:1 | AA | Lc -35.5 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C4DDF0
oklch(88.5% 0.037 240.7)
-
Step 300
300
#9AC7E9
oklch(80.9% 0.068 241.3)
-
Step 400
400
#5DA9DE
oklch(70.7% 0.109 241)
-
Step 500
500 (this color)
#0587CA
oklch(59.7% 0.139 241.6)
-
Step 600
600
#007AB8
oklch(55.5% 0.131 241.7)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#00466C
oklch(37.7% 0.089 241.5)
-
Step 950
950
#052940
oklch(26.9% 0.058 242)
#0587CA 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) | #6789CD | 0.066 |
| Deuteranopia (no green cones) | #4D79C9 | 0.049 |
| Tritanopia (no blue cones) | #00989F | 0.094 |
| Achromatopsia (no color) | #808080 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0587CA
#0587CA
oklch(59.7% 0.139 241.6)
- #B86900
#B86900
oklch(59.7% 0.138 61.9)
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 #0587CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.004
- Cool Blue #4984B8 ΔE 0.040
- Blue NCS #118AB2 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.042
- Windows Blue #3778BF ΔE 0.042
- Nice Blue #107AB0 ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.055
- Off Blue #5684AE ΔE 0.058
Use #0587CA 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.