#63709D
Closest named color: Dull Blue (#49759C). oklch(55.3% 0.072 271.5), rgb(99, 112, 157).
Aa
White text reads best on this color (4.84:1).
About this color
#63709D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.072 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.034 away. White text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.33:1 |
| White text | 4.84:1 |
Values
| HEX | #63709D |
| RGB | rgb(99, 112, 157) |
| HSL | hsl(227, 23%, 50%) |
| OKLCH | oklch(55.3% 0.072 271.5) |
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 #63709D | 4.84:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #63709D | 4.33:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #63709D text on white | 4.84:1 | AA | Lc 73.6 | Content text, not long reading |
| #63709D text on black | 4.33:1 | AA large text | Lc -28.1 | 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
#B9C0D6
oklch(80.9% 0.032 271.6)
-
Step 400
400
#959FC2
oklch(70.7% 0.052 272.5)
-
Step 500
500
#7B88B2
oklch(63.2% 0.065 271.1)
-
Step 600
600 (this color)
#63709D
oklch(55.3% 0.072 271.5)
-
Step 700
700
#535E87
oklch(49% 0.067 272.2)
-
Step 800
800
#444D6E
oklch(42.7% 0.056 272.1)
-
Step 900
900
#394059
oklch(37.6% 0.044 272.1)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#63709D 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) | #61749F | 0.011 |
| Deuteranopia (no green cones) | #5D6F9C | 0.009 |
| Tritanopia (no blue cones) | #527980 | 0.064 |
| Achromatopsia (no color) | #727272 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63709D
#63709D
oklch(55.3% 0.072 271.5)
- #82713F
#82713F
oklch(55.3% 0.072 91.2)
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 #63709D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.034
- Stormy Blue #507B9C ΔE 0.038
- Metallic Blue #4F738E ΔE 0.039
- Cerulean #457B9D ΔE 0.044
- Flat Blue #3C73A8 ΔE 0.046
- Muted Blue #3B719F ΔE 0.046
- Grey Blue #647D8E ΔE 0.051
- French Blue #436BAD ΔE 0.051
Use #63709D 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.