#3F6C8A
Closest named color: Denim (#3B638C). oklch(51.2% 0.069 239.3), rgb(63, 108, 138).
Aa
White text reads best on this color (5.64:1).
About this color
#3F6C8A is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.069 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.029 away. White text reads best on it, at 5.64:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.72:1 |
| White text | 5.64:1 |
Values
| HEX | #3F6C8A |
| RGB | rgb(63, 108, 138) |
| HSL | hsl(204, 37%, 39%) |
| OKLCH | oklch(51.2% 0.069 239.3) |
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 #3F6C8A | 5.64:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #3F6C8A | 3.72:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #3F6C8A text on white | 5.64:1 | AA | Lc 78.1 | Fine for body text |
| #3F6C8A text on black | 3.72:1 | AA large text | Lc -23.7 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D4
oklch(80.9% 0.033 239.5)
-
Step 400
400
#82A6BF
oklch(70.7% 0.054 238.8)
-
Step 500
500
#6290AF
oklch(63.2% 0.068 238.8)
-
Step 600
600
#48799A
oklch(55.5% 0.074 239.5)
-
Step 700
700 (this color)
#3F6C8A
oklch(51.2% 0.069 239.3)
-
Step 800
800
#30536B
oklch(42.6% 0.057 239.9)
-
Step 900
900
#2B4557
oklch(37.7% 0.044 239.7)
-
Step 950
950
#192833
oklch(26.9% 0.029 241)
#3F6C8A 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) | #5F6C8B | 0.039 |
| Deuteranopia (no green cones) | #546489 | 0.032 |
| Tritanopia (no blue cones) | #117476 | 0.056 |
| Achromatopsia (no color) | #676767 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6C8A
#3F6C8A
oklch(51.2% 0.069 239.3)
- #845D3D
#845D3D
oklch(51.2% 0.069 59.8)
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 #3F6C8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.029
- Metallic Blue #4F738E ΔE 0.029
- Muted Blue #3B719F ΔE 0.033
- Sea Blue #047495 ΔE 0.037
- Dull Blue #49759C ΔE 0.038
- Ocean Blue #03719C ΔE 0.040
- Slate #516572 ΔE 0.041
- Peacock Blue #016795 ΔE 0.046
Use #3F6C8A 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.