#63839F
Closest named color: Dusty Blue (#5A86AD). oklch(59.6% 0.056 245.3), rgb(99, 131, 159).
Aa
Black text reads best on this color (5.27:1).
About this color
#63839F is a medium-dark, muted blue. In OKLCH its lightness is 60%, its chroma 0.056 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.022 away. Black text reads best on it, at 5.27:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.27:1 |
| White text | 3.97:1 |
Values
| HEX | #63839F |
| RGB | rgb(99, 131, 159) |
| HSL | hsl(208, 24%, 51%) |
| OKLCH | oklch(59.6% 0.056 245.3) |
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 #63839F | 3.97:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #63839F | 5.27:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #63839F text on white | 3.97:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #63839F text on black | 5.27:1 | AA | Lc -34.6 | 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 500.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE3
oklch(88.4% 0.016 248)
-
Step 300
300
#B3C3D2
oklch(81% 0.028 246.4)
-
Step 400
400
#8AA4BB
oklch(70.7% 0.045 245.2)
-
Step 500
500 (this color)
#63839F
oklch(59.6% 0.056 245.3)
-
Step 600
600
#557795
oklch(55.5% 0.061 245.8)
-
Step 700
700
#45647F
oklch(49% 0.057 245.6)
-
Step 800
800
#395267
oklch(42.7% 0.046 244.5)
-
Step 900
900
#314454
oklch(37.7% 0.037 244.4)
-
Step 950
950
#1D2831
oklch(27.1% 0.023 243.4)
#63839F 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) | #7883A0 | 0.028 |
| Deuteranopia (no green cones) | #707D9E | 0.022 |
| Tritanopia (no blue cones) | #4F8A8C | 0.047 |
| Achromatopsia (no color) | #7F7F7F | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63839F
#63839F
oklch(59.6% 0.056 245.3)
- #97795B
#97795B
oklch(59.7% 0.057 66.4)
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 #63839F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.022
- Off Blue #5684AE ΔE 0.026
- Slate Gray #708090 ΔE 0.026
- Steel #738595 ΔE 0.027
- Grey Blue #647D8E ΔE 0.027
- Light Slate Gray #778899 ΔE 0.033
- Steel Grey #6F828A ΔE 0.034
- Stormy Blue #507B9C ΔE 0.034
Use #63839F 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.