#6391AB
Closest named color: Blue Grey (#758DA3). oklch(63.3% 0.063 233.9), rgb(99, 145, 171).
Aa
Black text reads best on this color (6.16:1).
About this color
#6391AB is a medium-light, muted blue. In OKLCH its lightness is 63%, its chroma 0.063 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.023 away. Black text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.16:1 |
| White text | 3.40:1 |
Values
| HEX | #6391AB |
| RGB | rgb(99, 145, 171) |
| HSL | hsl(202, 30%, 53%) |
| OKLCH | oklch(63.3% 0.063 233.9) |
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 #6391AB | 3.40:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #6391AB | 6.16:1 | AA | Lc 42.6 | Non-text elements, placeholder text |
| #6391AB text on white | 3.40:1 | AA large text | Lc 61.5 | Content text, not long reading |
| #6391AB text on black | 6.16:1 | AA | Lc -40.2 | 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
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D2
oklch(80.8% 0.031 235.7)
-
Step 400
400
#83A6BB
oklch(70.6% 0.049 234.7)
-
Step 500
500 (this color)
#6391AB
oklch(63.3% 0.063 233.9)
-
Step 600
600
#487A96
oklch(55.6% 0.069 234.5)
-
Step 700
700
#396780
oklch(49.2% 0.065 234)
-
Step 800
800
#305468
oklch(42.7% 0.053 234.2)
-
Step 900
900
#2B4554
oklch(37.6% 0.041 234.7)
-
Step 950
950
#192931
oklch(27% 0.026 230.6)
#6391AB 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) | #8590AC | 0.042 |
| Deuteranopia (no green cones) | #7B88AB | 0.037 |
| Tritanopia (no blue cones) | #469899 | 0.049 |
| Achromatopsia (no color) | #8B8B8B | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6391AB
#6391AB
oklch(63.3% 0.063 233.9)
- #A98066
#A98066
oklch(63.3% 0.063 53.6)
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 #6391AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.023
- Silver Lake Blue #778DA9 ΔE 0.025
- Faded Blue #658CBB ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.036
- Light Slate Gray #778899 ΔE 0.036
- Steel #738595 ΔE 0.041
- Off Blue #5684AE ΔE 0.044
- Cadet Blue #5F9EA0 ΔE 0.046
Use #6391AB 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.