#6397B5
Closest named color: Silver Lake Blue (#778DA9). oklch(65.1% 0.071 234.7), rgb(99, 151, 181).
Aa
Black text reads best on this color (6.62:1).
About this color
#6397B5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.071 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.034 away. Black text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.62:1 |
| White text | 3.17:1 |
Values
| HEX | #6397B5 |
| RGB | rgb(99, 151, 181) |
| HSL | hsl(202, 36%, 55%) |
| OKLCH | oklch(65.1% 0.071 234.7) |
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 #6397B5 | 3.17:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #6397B5 | 6.62:1 | AA | Lc 45.3 | Large or bold text, headings |
| #6397B5 text on white | 3.17:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #6397B5 text on black | 6.62:1 | AA | Lc -43.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ACC5D4
oklch(81% 0.034 234.2)
-
Step 400
400
#7FA7BF
oklch(70.8% 0.056 234.9)
-
Step 500
500 (this color)
#6397B5
oklch(65.1% 0.071 234.7)
-
Step 600
600
#427B9A
oklch(55.7% 0.077 234.3)
-
Step 700
700
#336784
oklch(49.1% 0.072 235.3)
-
Step 800
800
#2B546B
oklch(42.6% 0.06 235.1)
-
Step 900
900
#274657
oklch(37.8% 0.047 233.9)
-
Step 950
950
#182933
oklch(27.1% 0.029 235.2)
#6397B5 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) | #8996B7 | 0.046 |
| Deuteranopia (no green cones) | #7D8DB5 | 0.039 |
| Tritanopia (no blue cones) | #3F9FA1 | 0.054 |
| Achromatopsia (no color) | #919191 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6397B5
#6397B5
oklch(65.1% 0.071 234.7)
- #B28466
#B28466
oklch(65.1% 0.071 54.2)
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 #6397B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.034
- Faded Blue #658CBB ΔE 0.035
- Blue Grey #758DA3 ΔE 0.036
- Greyblue #77A1B5 ΔE 0.039
- Cadet Blue #5F9EA0 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.050
- Light Slate Gray #778899 ΔE 0.052
- Cool Gray #8D99AE ΔE 0.053
Use #6397B5 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.