#6688BF
Closest named color: Faded Blue (#658CBB). oklch(62.4% 0.092 259.8), rgb(102, 136, 191).
Aa
Black text reads best on this color (5.83:1).
About this color
#6688BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.092 and its hue 260°. 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 5.83:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.83:1 |
| White text | 3.59:1 |
Values
| HEX | #6688BF |
| RGB | rgb(102, 136, 191) |
| HSL | hsl(217, 41%, 57%) |
| OKLCH | oklch(62.4% 0.092 259.8) |
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 #6688BF | 3.59:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #6688BF | 5.83:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #6688BF text on white | 3.59:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #6688BF text on black | 5.83:1 | AA | Lc -38.2 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B0C2DE
oklch(80.9% 0.044 259.2)
-
Step 400
400
#86A2CE
oklch(70.7% 0.072 259.3)
-
Step 500
500 (this color)
#6688BF
oklch(62.4% 0.092 259.8)
-
Step 600
600
#4F73AE
oklch(55.5% 0.101 259.9)
-
Step 700
700
#406195
oklch(49.2% 0.092 259.2)
-
Step 800
800
#354F79
oklch(42.7% 0.077 259.6)
-
Step 900
900
#2E4261
oklch(37.7% 0.059 258.9)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#6688BF 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) | #738CC1 | 0.021 |
| Deuteranopia (no green cones) | #6983BE | 0.014 |
| Tritanopia (no blue cones) | #42949B | 0.083 |
| Achromatopsia (no color) | #878787 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6688BF
#6688BF
oklch(62.4% 0.092 259.8)
- #A58142
#A58142
oklch(62.5% 0.092 79.7)
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 #6688BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.014
- Dusty Blue #5A86AD ΔE 0.032
- Off Blue #5684AE ΔE 0.034
- Cool Blue #4984B8 ΔE 0.036
- Steel Blue #4682B4 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.052
- Lavender Gray #7E7F9A ΔE 0.060
Use #6688BF 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.