#6388BD
Closest named color: Faded Blue (#658CBB). oklch(62.1% 0.091 257.4), rgb(99, 136, 189).
Aa
Black text reads best on this color (5.78:1).
About this color
#6388BD is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.091 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.013 away. Black text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.78:1 |
| White text | 3.62:1 |
Values
| HEX | #6388BD |
| RGB | rgb(99, 136, 189) |
| HSL | hsl(215, 41%, 56%) |
| OKLCH | oklch(62.1% 0.091 257.4) |
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 #6388BD | 3.62:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #6388BD | 5.78:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #6388BD text on white | 3.62:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #6388BD text on black | 5.78:1 | AA | Lc -37.9 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DE
oklch(80.9% 0.045 258)
-
Step 400
400
#85A2CD
oklch(70.6% 0.071 258.1)
-
Step 500
500 (this color)
#6388BD
oklch(62.1% 0.091 257.4)
-
Step 600
600
#4D74AD
oklch(55.6% 0.1 257.8)
-
Step 700
700
#3E6194
oklch(49% 0.092 257.7)
-
Step 800
800
#335078
oklch(42.8% 0.075 256.7)
-
Step 900
900
#2D4261
oklch(37.6% 0.06 258)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#6388BD 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) | #748BBF | 0.024 |
| Deuteranopia (no green cones) | #6982BC | 0.017 |
| Tritanopia (no blue cones) | #3D949A | 0.082 |
| Achromatopsia (no color) | #868686 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6388BD
#6388BD
oklch(62.1% 0.091 257.4)
- #A57F43
#A57F43
oklch(62.1% 0.091 77.2)
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 #6388BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.013
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.030
- Cool Blue #4984B8 ΔE 0.032
- Steel Blue #4682B4 ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.044
- Blue Grey #758DA3 ΔE 0.051
- Light Slate Gray #778899 ΔE 0.059
Use #6388BD 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.