#5784CB
Closest named color: Cool Blue (#4984B8). oklch(61.3% 0.119 259.2), rgb(87, 132, 203).
Aa
Black text reads best on this color (5.56:1).
About this color
#5784CB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.119 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.034 away. Black text reads best on it, at 5.56:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.56:1 |
| White text | 3.77:1 |
Values
| HEX | #5784CB |
| RGB | rgb(87, 132, 203) |
| HSL | hsl(217, 53%, 57%) |
| OKLCH | oklch(61.3% 0.119 259.2) |
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 #5784CB | 3.77:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #5784CB | 5.56:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #5784CB text on white | 3.77:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #5784CB text on black | 5.56:1 | 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
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#AAC2E7
oklch(80.9% 0.059 259)
-
Step 400
400
#7DA2DB
oklch(70.7% 0.093 258.8)
-
Step 500
500 (this color)
#5784CB
oklch(61.3% 0.119 259.2)
-
Step 600
600
#4272BE
oklch(55.5% 0.13 259.2)
-
Step 700
700
#345FA4
oklch(49% 0.121 259.4)
-
Step 800
800
#2C4E85
oklch(42.7% 0.1 259.6)
-
Step 900
900
#27416A
oklch(37.6% 0.078 259.2)
-
Step 950
950
#17263E
oklch(26.8% 0.05 259.5)
#5784CB 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) | #6789CE | 0.024 |
| Deuteranopia (no green cones) | #587ECA | 0.016 |
| Tritanopia (no blue cones) | #00949E | 0.106 |
| Achromatopsia (no color) | #838383 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5784CB
#5784CB
oklch(61.3% 0.119 259.2)
- #AA7A1A
#AA7A1A
oklch(61.2% 0.119 78.9)
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 #5784CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.041
- Faded Blue #658CBB ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.042
- Water Blue #0E87CC ΔE 0.045
- Off Blue #5684AE ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.048
- Soft Blue #6488EA ΔE 0.050
Use #5784CB 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.