#63709E
Closest named color: Dull Blue (#49759C). oklch(55.3% 0.074 271.7), rgb(99, 112, 158).
Aa
White text reads best on this color (4.83:1).
About this color
#63709E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.074 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 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.34:1 |
| White text | 4.83:1 |
Values
| HEX | #63709E |
| RGB | rgb(99, 112, 158) |
| HSL | hsl(227, 23%, 50%) |
| OKLCH | oklch(55.3% 0.074 271.7) |
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 #63709E | 4.83:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #63709E | 4.34:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #63709E text on white | 4.83:1 | AA | Lc 73.5 | Content text, not long reading |
| #63709E text on black | 4.34:1 | AA large text | Lc -28.2 | 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
#D5D9E6
oklch(88.6% 0.018 272.3)
-
Step 300
300
#B9C0D7
oklch(81% 0.033 272.2)
-
Step 400
400
#959FC2
oklch(70.7% 0.052 272.5)
-
Step 500
500
#7B87B3
oklch(63% 0.068 272.5)
-
Step 600
600 (this color)
#63709E
oklch(55.3% 0.074 271.7)
-
Step 700
700
#535E88
oklch(49% 0.069 272.4)
-
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)
#63709E 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) | #6174A0 | 0.011 |
| Deuteranopia (no green cones) | #5C6F9D | 0.010 |
| Tritanopia (no blue cones) | #517980 | 0.066 |
| Achromatopsia (no color) | #727272 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63709E
#63709E
oklch(55.3% 0.074 271.7)
- #82713E
#82713E
oklch(55.3% 0.073 91.5)
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 #63709E, 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 0.040
- Cerulean #457B9D ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.045
- Muted Blue #3B719F ΔE 0.046
- French Blue #436BAD ΔE 0.050
- Grey Blue #647D8E ΔE 0.052
Use #63709E 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.