#647FB2
Closest named color: Off Blue (#5684AE). oklch(59.7% 0.085 262.6), rgb(100, 127, 178).
Aa
Black text reads best on this color (5.22:1).
About this color
#647FB2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.085 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.023 away. Black text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.22:1 |
| White text | 4.02:1 |
Values
| HEX | #647FB2 |
| RGB | rgb(100, 127, 178) |
| HSL | hsl(219, 34%, 55%) |
| OKLCH | oklch(59.7% 0.085 262.6) |
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 #647FB2 | 4.02:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #647FB2 | 5.22:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #647FB2 text on white | 4.02:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #647FB2 text on black | 5.22:1 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1D9E9
oklch(88.4% 0.024 264.4)
-
Step 300
300
#B3C1DC
oklch(80.9% 0.041 263.6)
-
Step 400
400
#8BA1CB
oklch(70.7% 0.067 263.2)
-
Step 500
500 (this color)
#647FB2
oklch(59.7% 0.085 262.6)
-
Step 600
600
#5673A9
oklch(55.7% 0.091 262.2)
-
Step 700
700
#466091
oklch(49.1% 0.085 262.4)
-
Step 800
800
#3A4E76
oklch(42.6% 0.071 263.4)
-
Step 900
900
#32415F
oklch(37.6% 0.055 263.6)
-
Step 950
950
#1D2638
oklch(26.9% 0.036 263.7)
#647FB2 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) | #6D83B4 | 0.017 |
| Deuteranopia (no green cones) | #647BB1 | 0.011 |
| Tritanopia (no blue cones) | #488A91 | 0.076 |
| Achromatopsia (no color) | #7F7F7F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647FB2
#647FB2
oklch(59.7% 0.085 262.6)
- #987A41
#987A41
oklch(59.6% 0.084 82)
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 #647FB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.025
- Cool Blue #4984B8 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.032
- Faded Blue #658CBB ΔE 0.036
- Stormy Blue #507B9C ΔE 0.044
- Lavender Gray #7E7F9A ΔE 0.049
- Cerulean #457B9D ΔE 0.051
Use #647FB2 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.