#6591C8
Closest named color: Faded Blue (#658CBB). oklch(64.7% 0.096 254.5), rgb(101, 145, 200).
Aa
Black text reads best on this color (6.43:1).
About this color
#6591C8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.096 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.021 away. Black text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.43:1 |
| White text | 3.26:1 |
Values
| HEX | #6591C8 |
| RGB | rgb(101, 145, 200) |
| HSL | hsl(213, 47%, 59%) |
| OKLCH | oklch(64.7% 0.096 254.5) |
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 #6591C8 | 3.26:1 | AA large text | Lc -65.3 | Content text, not long reading |
| Black text on #6591C8 | 6.43:1 | AA | Lc 44.2 | Non-text elements, placeholder text |
| #6591C8 text on white | 3.26:1 | AA large text | Lc 59.8 | Large or bold text, headings |
| #6591C8 text on black | 6.43:1 | AA | Lc -41.9 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3DF
oklch(80.9% 0.047 253.5)
-
Step 400
400
#81A3CF
oklch(70.7% 0.075 255.1)
-
Step 500
500 (this color)
#6591C8
oklch(64.7% 0.096 254.5)
-
Step 600
600
#4675AF
oklch(55.5% 0.105 254.5)
-
Step 700
700
#386297
oklch(49.1% 0.098 255.1)
-
Step 800
800
#2E507A
oklch(42.6% 0.081 254.6)
-
Step 900
900
#2A4362
oklch(37.8% 0.062 254.4)
-
Step 950
950
#19273A
oklch(27% 0.041 256.3)
#6591C8 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) | #7B94CA | 0.029 |
| Deuteranopia (no green cones) | #6F8AC7 | 0.021 |
| Tritanopia (no blue cones) | #379DA4 | 0.084 |
| Achromatopsia (no color) | #8E8E8E | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6591C8
#6591C8
oklch(64.7% 0.096 254.5)
- #B18547
#B18547
oklch(64.7% 0.096 74.1)
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 #6591C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.021
- Silver Lake Blue #778DA9 ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.049
- Off Blue #5684AE ΔE 0.053
- Cool Blue #4984B8 ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.055
- Blue Grey #758DA3 ΔE 0.056
Use #6591C8 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.