#617ACD
Closest named color: Windows Blue (#3778BF). oklch(59.8% 0.13 269.5), rgb(97, 122, 205).
Aa
Black text reads best on this color (5.17:1).
About this color
#617ACD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.130 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.050 away. Black text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.17:1 |
| White text | 4.05:1 |
Values
| HEX | #617ACD |
| RGB | rgb(97, 122, 205) |
| HSL | hsl(226, 52%, 59%) |
| OKLCH | oklch(59.8% 0.13 269.5) |
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 #617ACD | 4.05:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #617ACD | 5.17:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #617ACD text on white | 4.05:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #617ACD text on black | 5.17:1 | AA | Lc -34.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0BFEB
oklch(80.8% 0.065 270.2)
-
Step 400
400
#879EE1
oklch(70.8% 0.102 269.2)
-
Step 500
500 (this color)
#617ACD
oklch(59.8% 0.13 269.5)
-
Step 600
600
#536CC5
oklch(55.6% 0.141 269.6)
-
Step 700
700
#445AAB
oklch(49.2% 0.132 269.6)
-
Step 800
800
#384A8A
oklch(42.8% 0.108 269.6)
-
Step 900
900
#303E6E
oklch(37.7% 0.084 269.8)
-
Step 950
950
#1C2541
oklch(27.1% 0.054 269.1)
#617ACD 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) | #5883D0 | 0.024 |
| Deuteranopia (no green cones) | #4C7ACB | 0.024 |
| Tritanopia (no blue cones) | #2D8C99 | 0.117 |
| Achromatopsia (no color) | #7E7E7E | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617ACD
#617ACD
oklch(59.8% 0.13 269.5)
- #9C7B00
#9C7B00
oklch(59.8% 0.122 89.8)
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 #617ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.050
- Soft Blue #6488EA ΔE 0.053
- Cool Blue #4984B8 ΔE 0.053
- Steel Blue #4682B4 ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.060
- Off Blue #5684AE ΔE 0.063
- Faded Blue #658CBB ΔE 0.063
- Water Blue #0E87CC ΔE 0.063
Use #617ACD 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.