#647FD3
Closest named color: Soft Blue (#6488EA). oklch(61.4% 0.131 268.9), rgb(100, 127, 211).
Aa
Black text reads best on this color (5.51:1).
About this color
#647FD3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.131 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.038 away. Black text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.51:1 |
| White text | 3.80:1 |
Values
| HEX | #647FD3 |
| RGB | rgb(100, 127, 211) |
| HSL | hsl(225, 56%, 61%) |
| OKLCH | oklch(61.4% 0.131 268.9) |
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 #647FD3 | 3.80:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #647FD3 | 5.51:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #647FD3 text on white | 3.80:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #647FD3 text on black | 5.51:1 | AA | Lc -36.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AFC0EB
oklch(80.9% 0.064 268.1)
-
Step 400
400
#869EE1
oklch(70.7% 0.102 268.6)
-
Step 500
500 (this color)
#647FD3
oklch(61.4% 0.131 268.9)
-
Step 600
600
#516CC6
oklch(55.5% 0.143 268.8)
-
Step 700
700
#425AAB
oklch(49.1% 0.132 268.7)
-
Step 800
800
#364A8B
oklch(42.7% 0.11 268.6)
-
Step 900
900
#2F3E6F
oklch(37.7% 0.086 269.2)
-
Step 950
950
#1B2541
oklch(27% 0.054 267.8)
#647FD3 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) | #5D88D6 | 0.024 |
| Deuteranopia (no green cones) | #507ED1 | 0.023 |
| Tritanopia (no blue cones) | #2E919F | 0.117 |
| Achromatopsia (no color) | #838383 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647FD3
#647FD3
oklch(61.4% 0.131 268.9)
- #A37F00
#A37F00
oklch(61.4% 0.125 88.6)
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 #647FD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.048
- Cool Blue #4984B8 ΔE 0.056
- Faded Blue #658CBB ΔE 0.058
- Cornflower #6A79F7 ΔE 0.059
- Windows Blue #3778BF ΔE 0.061
- Steel Blue #4682B4 ΔE 0.062
- Water Blue #0E87CC ΔE 0.064
Use #647FD3 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.