#63809C
Closest named color: Grey Blue (#647D8E). oklch(58.8% 0.055 247.9), rgb(99, 128, 156).
Aa
Black text reads best on this color (5.09:1).
About this color
#63809C is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.055 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.021 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #63809C |
| RGB | rgb(99, 128, 156) |
| HSL | hsl(209, 22%, 50%) |
| OKLCH | oklch(58.8% 0.055 247.9) |
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 #63809C | 4.11:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #63809C | 5.09:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #63809C text on white | 4.11:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #63809C text on black | 5.09:1 | AA | Lc -33.4 | 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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8EA3B8
oklch(70.6% 0.039 248.4)
-
Step 500
500
#728DA7
oklch(63.2% 0.05 247.6)
-
Step 600
600 (this color)
#63809C
oklch(58.8% 0.055 247.9)
-
Step 700
700
#4A647C
oklch(49.2% 0.05 246.8)
-
Step 800
800
#3D5165
oklch(42.7% 0.042 248.8)
-
Step 900
900
#344352
oklch(37.6% 0.032 248.7)
-
Step 950
950
#1E2730
oklch(26.8% 0.021 248.6)
#63809C 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) | #75809D | 0.024 |
| Deuteranopia (no green cones) | #6E7A9B | 0.021 |
| Tritanopia (no blue cones) | #508689 | 0.046 |
| Achromatopsia (no color) | #7D7D7D | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63809C
#63809C
oklch(58.8% 0.055 247.9)
- #93775A
#93775A
oklch(58.9% 0.054 67.4)
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 #63809C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.021
- Slate Gray #708090 ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.027
- Stormy Blue #507B9C ΔE 0.028
- Off Blue #5684AE ΔE 0.029
- Steel #738595 ΔE 0.030
- Steel Grey #6F828A ΔE 0.033
- Battleship Grey #6B7C85 ΔE 0.034
Use #63809C 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.