#6691CF
Closest named color: Faded Blue (#658CBB). oklch(65.1% 0.105 257.5), rgb(102, 145, 207).
Aa
Black text reads best on this color (6.51:1).
About this color
#6691CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.105 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.031 away. Black text reads best on it, at 6.51:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.51:1 |
| White text | 3.22:1 |
Values
| HEX | #6691CF |
| RGB | rgb(102, 145, 207) |
| HSL | hsl(215, 52%, 61%) |
| OKLCH | oklch(65.1% 0.105 257.5) |
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 #6691CF | 3.22:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #6691CF | 6.51:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #6691CF text on white | 3.22:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #6691CF text on black | 6.51:1 | AA | Lc -42.4 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ACC2E2
oklch(80.8% 0.051 257.7)
-
Step 400
400
#80A2D4
oklch(70.6% 0.083 257.9)
-
Step 500
500 (this color)
#6691CF
oklch(65.1% 0.105 257.5)
-
Step 600
600
#4674B5
oklch(55.6% 0.114 257.2)
-
Step 700
700
#38619C
oklch(49.2% 0.106 257.6)
-
Step 800
800
#2E4F7E
oklch(42.6% 0.088 257.4)
-
Step 900
900
#2A4265
oklch(37.7% 0.067 257.7)
-
Step 950
950
#19273B
oklch(27% 0.042 257.3)
#6691CF 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) | #7995D2 | 0.027 |
| Deuteranopia (no green cones) | #6C8BCE | 0.017 |
| Tritanopia (no blue cones) | #339FA7 | 0.093 |
| Achromatopsia (no color) | #8F8F8F | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6691CF
#6691CF
oklch(65.1% 0.105 257.5)
- #B3873E
#B3873E
oklch(65.2% 0.105 77.7)
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 #6691CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.052
- Soft Blue #6488EA ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.058
- Cool Blue #4984B8 ΔE 0.059
Use #6691CF 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.