#636698
Closest named color: Dusky Blue (#475F94). oklch(52.9% 0.078 280.7), rgb(99, 102, 152).
Aa
White text reads best on this color (5.40:1).
About this color
#636698 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 53%, its chroma 0.078 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.046 away. White text reads best on it, at 5.40:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #636698 |
| RGB | rgb(99, 102, 152) |
| HSL | hsl(237, 21%, 49%) |
| OKLCH | oklch(52.9% 0.078 280.7) |
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 #636698 | 5.40:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #636698 | 3.88:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #636698 text on white | 5.40:1 | AA | Lc 76.9 | Fine for body text |
| #636698 text on black | 3.88:1 | AA large text | Lc -24.8 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E6
oklch(88.5% 0.019 279.5)
-
Step 300
300
#BCBFD8
oklch(81% 0.035 280.2)
-
Step 400
400
#9A9DC4
oklch(70.7% 0.057 281.4)
-
Step 500
500
#8185B5
oklch(63.2% 0.072 280.4)
-
Step 600
600 (this color)
#636698
oklch(52.9% 0.078 280.7)
-
Step 700
700
#595C89
oklch(49.1% 0.072 280.5)
-
Step 800
800
#494B70
oklch(42.7% 0.061 281.1)
-
Step 900
900
#3D3F5A
oklch(37.8% 0.046 280.7)
-
Step 950
950
#242535
oklch(27.1% 0.03 281.4)
#636698 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) | #576C9A | 0.022 |
| Deuteranopia (no green cones) | #546897 | 0.021 |
| Tritanopia (no blue cones) | #556F78 | 0.068 |
| Achromatopsia (no color) | #6A6A6A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #636698
#636698
oklch(52.9% 0.078 280.7)
- #756D33
#756D33
oklch(52.9% 0.079 101.5)
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 #636698, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.046
- French Blue #436BAD ΔE 0.049
- Dull Blue #49759C ΔE 0.050
- Metallic Blue #4F738E ΔE 0.051
- Muted Blue #3B719F ΔE 0.052
- Dark Lavender #856798 ΔE 0.054
- Dusty Purple #825F87 ΔE 0.055
- Muted Purple #805B87 ΔE 0.055
Use #636698 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.