#6597BF
Closest named color: Faded Blue (#658CBB). oklch(65.7% 0.08 243.6), rgb(101, 151, 191).
Aa
Black text reads best on this color (6.73:1).
About this color
#6597BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.080 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.030 away. Black text reads best on it, at 6.73:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.73:1 |
| White text | 3.11:1 |
Values
| HEX | #6597BF |
| RGB | rgb(101, 151, 191) |
| HSL | hsl(207, 41%, 57%) |
| OKLCH | oklch(65.7% 0.08 243.6) |
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 #6597BF | 3.11:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #6597BF | 6.73:1 | AA | Lc 45.9 | Large or bold text, headings |
| #6597BF text on white | 3.11:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #6597BF text on black | 6.73:1 | AA | Lc -43.6 | 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
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ACC4D9
oklch(80.9% 0.04 244.7)
-
Step 400
400
#7FA6C5
oklch(70.8% 0.062 242.7)
-
Step 500
500 (this color)
#6597BF
oklch(65.7% 0.08 243.6)
-
Step 600
600
#4279A3
oklch(55.7% 0.088 243.4)
-
Step 700
700
#34658B
oklch(49% 0.081 244)
-
Step 800
800
#2C5371
oklch(42.7% 0.067 243.5)
-
Step 900
900
#28455B
oklch(37.8% 0.052 242.6)
-
Step 950
950
#182836
oklch(27% 0.034 245.9)
#6597BF 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) | #8697C1 | 0.040 |
| Deuteranopia (no green cones) | #7A8EBE | 0.033 |
| Tritanopia (no blue cones) | #3DA1A4 | 0.067 |
| Achromatopsia (no color) | #929292 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6597BF
#6597BF
oklch(65.7% 0.08 243.6)
- #B4875C
#B4875C
oklch(65.7% 0.08 64.4)
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 #6597BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.030
- Silver Lake Blue #778DA9 ΔE 0.039
- Greyblue #77A1B5 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.053
- Cool Gray #8D99AE ΔE 0.055
- Cadet Blue #5F9EA0 ΔE 0.058
- Bluey Grey #89A0B0 ΔE 0.059
Use #6597BF 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.