#6591BF
Closest named color: Faded Blue (#658CBB). oklch(64.3% 0.085 250.3), rgb(101, 145, 191).
Aa
Black text reads best on this color (6.35:1).
About this color
#6591BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.085 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.014 away. Black text reads best on it, at 6.35:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #6591BF |
| RGB | rgb(101, 145, 191) |
| HSL | hsl(211, 41%, 57%) |
| OKLCH | oklch(64.3% 0.085 250.3) |
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 #6591BF | 3.30:1 | AA large text | Lc -65.8 | Content text, not long reading |
| Black text on #6591BF | 6.35:1 | AA | Lc 43.7 | Non-text elements, placeholder text |
| #6591BF text on white | 3.30:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #6591BF text on black | 6.35:1 | AA | Lc -41.4 | 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
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ADC3DB
oklch(80.8% 0.042 250.6)
-
Step 400
400
#82A4C9
oklch(70.7% 0.066 250.9)
-
Step 500
500 (this color)
#6591BF
oklch(64.3% 0.085 250.3)
-
Step 600
600
#4777A7
oklch(55.6% 0.092 249.8)
-
Step 700
700
#39648F
oklch(49.2% 0.084 249.9)
-
Step 800
800
#2F5174
oklch(42.6% 0.071 250.5)
-
Step 900
900
#2A445E
oklch(37.8% 0.055 249.5)
-
Step 950
950
#192837
oklch(27.1% 0.035 249.2)
#6591BF 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) | #7F92C1 | 0.032 |
| Deuteranopia (no green cones) | #7389BE | 0.026 |
| Tritanopia (no blue cones) | #3E9CA1 | 0.073 |
| Achromatopsia (no color) | #8D8D8D | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6591BF
#6591BF
oklch(64.3% 0.085 250.3)
- #AE8452
#AE8452
oklch(64.3% 0.084 70.2)
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 #6591BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.014
- Silver Lake Blue #778DA9 ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.040
- Blue Grey #758DA3 ΔE 0.043
- Off Blue #5684AE ΔE 0.046
- Cool Blue #4984B8 ΔE 0.050
- Light Slate Gray #778899 ΔE 0.057
- Steel Blue #4682B4 ΔE 0.058
Use #6591BF 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.