#4587C8
Closest named color: Cool Blue (#4984B8). oklch(61% 0.12 250.1), rgb(69, 135, 200).
Aa
Black text reads best on this color (5.55:1).
About this color
#4587C8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.024 away. Black text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.55:1 |
| White text | 3.78:1 |
Values
| HEX | #4587C8 |
| RGB | rgb(69, 135, 200) |
| HSL | hsl(210, 54%, 53%) |
| OKLCH | oklch(61% 0.12 250.1) |
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 #4587C8 | 3.78:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #4587C8 | 5.55:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #4587C8 text on white | 3.78:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #4587C8 text on black | 5.55:1 | AA | Lc -36.6 | 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
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E6
oklch(80.9% 0.059 250.9)
-
Step 400
400
#73A5D9
oklch(70.7% 0.093 250.2)
-
Step 500
500 (this color)
#4587C8
oklch(61% 0.12 250.1)
-
Step 600
600
#2C76BC
oklch(55.5% 0.131 250.5)
-
Step 700
700
#1D63A2
oklch(49% 0.122 250.1)
-
Step 800
800
#1B5183
oklch(42.6% 0.1 250.1)
-
Step 900
900
#1D4469
oklch(37.8% 0.077 249.6)
-
Step 950
950
#12283E
oklch(27.1% 0.05 250.2)
#4587C8 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) | #6B8ACB | 0.042 |
| Deuteranopia (no green cones) | #587EC7 | 0.028 |
| Tritanopia (no blue cones) | #00969E | 0.094 |
| Achromatopsia (no color) | #838383 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4587C8
#4587C8
oklch(61% 0.12 250.1)
- #B07520
#B07520
oklch(61% 0.12 70.6)
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 #4587C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.024
- Water Blue #0E87CC ΔE 0.029
- Steel Blue #4682B4 ΔE 0.031
- Off Blue #5684AE ΔE 0.040
- Faded Blue #658CBB ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.044
- Windows Blue #3778BF ΔE 0.046
Use #4587C8 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.