#39637F
Closest named color: Denim (#3B638C). oklch(48.1% 0.065 239.3), rgb(57, 99, 127).
Aa
White text reads best on this color (6.43:1).
About this color
#39637F is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.065 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.022 away. White text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #39637F |
| RGB | rgb(57, 99, 127) |
| HSL | hsl(204, 38%, 36%) |
| OKLCH | oklch(48.1% 0.065 239.3) |
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 #39637F | 6.43:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #39637F | 3.26:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #39637F text on white | 6.43:1 | AA | Lc 81.8 | Fine for body text |
| #39637F text on black | 3.26:1 | AA large text | Lc -20.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D3
oklch(80.9% 0.031 238.9)
-
Step 400
400
#84A6BD
oklch(70.8% 0.05 238)
-
Step 500
500
#658FAD
oklch(63.1% 0.065 240.1)
-
Step 600
600
#4B7998
oklch(55.6% 0.07 239.2)
-
Step 700
700 (this color)
#39637F
oklch(48.1% 0.065 239.3)
-
Step 800
800
#32536A
oklch(42.7% 0.054 240.2)
-
Step 900
900
#2C4556
oklch(37.8% 0.042 239.1)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#39637F 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) | #566380 | 0.036 |
| Deuteranopia (no green cones) | #4D5B7F | 0.032 |
| Tritanopia (no blue cones) | #0D6A6C | 0.053 |
| Achromatopsia (no color) | #5F5F5F | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39637F
#39637F
oklch(48.1% 0.065 239.3)
- #795537
#795537
oklch(48.1% 0.065 60.2)
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 #39637F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.022
- YInMn Blue #415A77 ΔE 0.027
- Slate #516572 ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.037
- Peacock Blue #016795 ΔE 0.043
- Dusky Blue #475F94 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.044
- Dusty Grape #545775 ΔE 0.045
Use #39637F 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.