#647CC2
Closest named color: Cool Blue (#4984B8). oklch(59.8% 0.111 268.6), rgb(100, 124, 194).
Aa
Black text reads best on this color (5.20:1).
About this color
#647CC2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.111 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.041 away. Black text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.20:1 |
| White text | 4.03:1 |
Values
| HEX | #647CC2 |
| RGB | rgb(100, 124, 194) |
| HSL | hsl(225, 44%, 58%) |
| OKLCH | oklch(59.8% 0.111 268.6) |
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 #647CC2 | 4.03:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #647CC2 | 5.20:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #647CC2 text on white | 4.03:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #647CC2 text on black | 5.20:1 | 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 500.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B2C0E5
oklch(80.9% 0.055 268.9)
-
Step 400
400
#8A9FD7
oklch(70.8% 0.086 268.3)
-
Step 500
500 (this color)
#647CC2
oklch(59.8% 0.111 268.6)
-
Step 600
600
#566FBA
oklch(55.7% 0.12 268.4)
-
Step 700
700
#465CA0
oklch(49.1% 0.112 268.5)
-
Step 800
800
#3A4C82
oklch(42.9% 0.093 268.4)
-
Step 900
900
#313F68
oklch(37.6% 0.073 268.5)
-
Step 950
950
#1D253D
oklch(26.9% 0.046 269.1)
#647CC2 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) | #6283C5 | 0.019 |
| Deuteranopia (no green cones) | #587BC0 | 0.016 |
| Tritanopia (no blue cones) | #3E8B96 | 0.099 |
| Achromatopsia (no color) | #7E7E7E | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647CC2
#647CC2
oklch(59.8% 0.111 268.6)
- #9B7B20
#9B7B20
oklch(59.8% 0.111 88.1)
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 #647CC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.044
- Off Blue #5684AE ΔE 0.046
- Faded Blue #658CBB ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.050
- Windows Blue #3778BF ΔE 0.050
- Water Blue #0E87CC ΔE 0.063
- Soft Blue #6488EA ΔE 0.063
Use #647CC2 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.