#6591C4
Closest named color: Faded Blue (#658CBB). oklch(64.6% 0.091 252.8), rgb(101, 145, 196).
Aa
Black text reads best on this color (6.40:1).
About this color
#6591C4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.091 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.017 away. Black text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.40:1 |
| White text | 3.28:1 |
Values
| HEX | #6591C4 |
| RGB | rgb(101, 145, 196) |
| HSL | hsl(212, 45%, 58%) |
| OKLCH | oklch(64.6% 0.091 252.8) |
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 #6591C4 | 3.28:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #6591C4 | 6.40:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #6591C4 text on white | 3.28:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #6591C4 text on black | 6.40:1 | AA | Lc -41.7 | 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 500.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ADC3DD
oklch(80.9% 0.044 252.7)
-
Step 400
400
#81A4CC
oklch(70.7% 0.07 252.1)
-
Step 500
500 (this color)
#6591C4
oklch(64.6% 0.091 252.8)
-
Step 600
600
#4776AC
oklch(55.7% 0.099 253)
-
Step 700
700
#386393
oklch(49.1% 0.091 252.5)
-
Step 800
800
#2F5178
oklch(42.8% 0.076 253)
-
Step 900
900
#2A4360
oklch(37.6% 0.059 253)
-
Step 950
950
#192738
oklch(26.9% 0.037 253.8)
#6591C4 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) | #7D93C6 | 0.030 |
| Deuteranopia (no green cones) | #718AC3 | 0.022 |
| Tritanopia (no blue cones) | #3A9DA3 | 0.080 |
| Achromatopsia (no color) | #8E8E8E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6591C4
#6591C4
oklch(64.6% 0.091 252.8)
- #B0854C
#B0854C
oklch(64.6% 0.091 72.8)
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 #6591C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.017
- Silver Lake Blue #778DA9 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.045
- Off Blue #5684AE ΔE 0.050
- Blue Grey #758DA3 ΔE 0.050
- Cool Blue #4984B8 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.058
- Steel Blue #4682B4 ΔE 0.059
Use #6591C4 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.