#6379AA
Closest named color: Off Blue (#5684AE). oklch(57.9% 0.08 265.4), rgb(99, 121, 170).
Aa
Black text reads best on this color (4.84:1).
About this color
#6379AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.080 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.032 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #6379AA |
| RGB | rgb(99, 121, 170) |
| HSL | hsl(221, 29%, 53%) |
| OKLCH | oklch(57.9% 0.08 265.4) |
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 #6379AA | 4.33:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #6379AA | 4.84:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #6379AA text on white | 4.33:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #6379AA text on black | 4.84:1 | AA | Lc -31.7 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B5C1D9
oklch(80.9% 0.036 264.3)
-
Step 400
400
#8FA0C5
oklch(70.6% 0.058 265.6)
-
Step 500
500
#7489B7
oklch(63.1% 0.074 265.4)
-
Step 600
600 (this color)
#6379AA
oklch(57.9% 0.08 265.4)
-
Step 700
700
#4C608B
oklch(49.1% 0.074 264.7)
-
Step 800
800
#3F4E71
oklch(42.7% 0.062 266.1)
-
Step 900
900
#35415C
oklch(37.7% 0.049 265.7)
-
Step 950
950
#1F2636
oklch(26.9% 0.032 266.1)
#6379AA 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) | #687DAC | 0.014 |
| Deuteranopia (no green cones) | #6176A9 | 0.009 |
| Tritanopia (no blue cones) | #4B838A | 0.072 |
| Achromatopsia (no color) | #797979 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6379AA
#6379AA
oklch(57.9% 0.08 265.4)
- #90763F
#90763F
oklch(57.9% 0.08 84.5)
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 #6379AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.032
- Stormy Blue #507B9C ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.036
- Steel Blue #4682B4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.039
- Dull Blue #49759C ΔE 0.041
- Cerulean #457B9D ΔE 0.042
- Grey Blue #647D8E ΔE 0.049
Use #6379AA 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.