#63709B
Closest named color: Dull Blue (#49759C). oklch(55.2% 0.069 271.1), rgb(99, 112, 155).
Aa
White text reads best on this color (4.85:1).
About this color
#63709B is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.069 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.033 away. White text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.32:1 |
| White text | 4.85:1 |
Values
| HEX | #63709B |
| RGB | rgb(99, 112, 155) |
| HSL | hsl(226, 22%, 50%) |
| OKLCH | oklch(55.2% 0.069 271.1) |
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 #63709B | 4.85:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #63709B | 4.32:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #63709B text on white | 4.85:1 | AA | Lc 73.7 | Content text, not long reading |
| #63709B text on black | 4.32:1 | AA large text | Lc -28.0 | Dividers and decoration only |
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 600.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D5D9E5
oklch(88.6% 0.017 271.2)
-
Step 300
300
#B9C0D5
oklch(80.9% 0.031 271)
-
Step 400
400
#959FC0
oklch(70.6% 0.05 271.9)
-
Step 500
500
#7B88B1
oklch(63.2% 0.064 270.8)
-
Step 600
600 (this color)
#63709B
oklch(55.2% 0.069 271.1)
-
Step 700
700
#535F86
oklch(49.2% 0.065 270.8)
-
Step 800
800
#444D6D
oklch(42.6% 0.055 271.8)
-
Step 900
900
#394158
oklch(37.8% 0.041 269.5)
-
Step 950
950
#222634
oklch(27.1% 0.027 272.1)
#63709B 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) | #62749D | 0.011 |
| Deuteranopia (no green cones) | #5D6F9A | 0.009 |
| Tritanopia (no blue cones) | #53787F | 0.061 |
| Achromatopsia (no color) | #717171 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63709B
#63709B
oklch(55.2% 0.069 271.1)
- #817141
#817141
oklch(55.2% 0.069 91.6)
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 #63709B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.033
- Metallic Blue #4F738E ΔE 0.036
- Stormy Blue #507B9C ΔE 0.037
- Cerulean #457B9D ΔE 0.044
- Muted Blue #3B719F ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.046
- Grey Blue #647D8E ΔE 0.049
- Grey Purple #826D8C ΔE 0.050
Use #63709B 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.