#63759F
Closest named color: Stormy Blue (#507B9C). oklch(56.5% 0.069 266.3), rgb(99, 117, 159).
Aa
White text reads best on this color (4.58:1).
About this color
#63759F is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.069 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.029 away. White text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #63759F |
| RGB | rgb(99, 117, 159) |
| HSL | hsl(222, 24%, 51%) |
| OKLCH | oklch(56.5% 0.069 266.3) |
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 #63759F | 4.58:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #63759F | 4.57:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #63759F text on white | 4.58:1 | AA | Lc 71.8 | Content text, not long reading |
| #63759F text on black | 4.57:1 | AA | Lc -29.8 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E5
oklch(88.5% 0.017 267.8)
-
Step 300
300
#B7C1D5
oklch(80.9% 0.03 264.4)
-
Step 400
400
#92A0C0
oklch(70.6% 0.05 266.5)
-
Step 500
500
#7889B1
oklch(63.2% 0.064 266.7)
-
Step 600
600 (this color)
#63759F
oklch(56.5% 0.069 266.3)
-
Step 700
700
#506086
oklch(49.2% 0.064 266.5)
-
Step 800
800
#414E6C
oklch(42.6% 0.053 266.1)
-
Step 900
900
#374158
oklch(37.6% 0.042 266.2)
-
Step 950
950
#202633
oklch(26.9% 0.026 265.4)
#63759F 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) | #6778A1 | 0.011 |
| Deuteranopia (no green cones) | #61739E | 0.007 |
| Tritanopia (no blue cones) | #507E84 | 0.062 |
| Achromatopsia (no color) | #757575 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63759F
#63759F
oklch(56.5% 0.069 266.3)
- #887345
#887345
oklch(56.5% 0.069 85.7)
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 #63759F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.029
- Dull Blue #49759C ΔE 0.032
- Cerulean #457B9D ΔE 0.037
- Metallic Blue #4F738E ΔE 0.039
- Grey Blue #647D8E ΔE 0.041
- Off Blue #5684AE ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.047
Use #63759F 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.