#6597CB
Closest named color: Faded Blue (#658CBB). oklch(66.2% 0.095 250.3), rgb(101, 151, 203).
Aa
Black text reads best on this color (6.84:1).
About this color
#6597CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.095 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.034 away. Black text reads best on it, at 6.84:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.84:1 |
| White text | 3.06:1 |
Values
| HEX | #6597CB |
| RGB | rgb(101, 151, 203) |
| HSL | hsl(211, 50%, 60%) |
| OKLCH | oklch(66.2% 0.095 250.3) |
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 #6597CB | 3.06:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #6597CB | 6.84:1 | AA | Lc 46.6 | Large or bold text, headings |
| #6597CB text on white | 3.06:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #6597CB text on black | 6.84:1 | AA | Lc -44.3 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC4DE
oklch(81% 0.046 249.4)
-
Step 400
400
#7EA4CE
oklch(70.6% 0.075 251.4)
-
Step 500
500 (this color)
#6597CB
oklch(66.2% 0.095 250.3)
-
Step 600
600
#4177AD
oklch(55.7% 0.102 250.1)
-
Step 700
700
#326495
oklch(49.2% 0.096 250)
-
Step 800
800
#2A5179
oklch(42.6% 0.08 250.8)
-
Step 900
900
#274461
oklch(37.8% 0.061 249.7)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#6597CB 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) | #8299CD | 0.036 |
| Deuteranopia (no green cones) | #758FCA | 0.026 |
| Tritanopia (no blue cones) | #33A3A9 | 0.082 |
| Achromatopsia (no color) | #939393 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6597CB
#6597CB
oklch(66.2% 0.095 250.3)
- #B8884F
#B8884F
oklch(66.1% 0.095 69.7)
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 #6597CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.034
- Silver Lake Blue #778DA9 ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.053
- Greyblue #77A1B5 ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.059
- Blue Grey #758DA3 ΔE 0.060
- Chefchaouen Blue #4895EF ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.061
Use #6597CB 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.