#3E647B
Closest named color: Slate (#516572). oklch(48.4% 0.057 236.2), rgb(62, 100, 123).
Aa
White text reads best on this color (6.33:1).
About this color
#3E647B is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.057 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.027 away. White text reads best on it, at 6.33:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #3E647B |
| RGB | rgb(62, 100, 123) |
| HSL | hsl(203, 33%, 36%) |
| OKLCH | oklch(48.4% 0.057 236.2) |
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 #3E647B | 6.33:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #3E647B | 3.31:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #3E647B text on white | 6.33:1 | AA | Lc 81.4 | Fine for body text |
| #3E647B text on black | 3.31:1 | AA large text | Lc -20.4 | 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
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B1C4D0
oklch(81% 0.027 235.4)
-
Step 400
400
#87A5B9
oklch(70.6% 0.044 237.4)
-
Step 500
500
#688FA7
oklch(63% 0.056 235.9)
-
Step 600
600
#4F7993
oklch(55.6% 0.062 236.6)
-
Step 700
700 (this color)
#3E647B
oklch(48.4% 0.057 236.2)
-
Step 800
800
#355366
oklch(42.7% 0.048 237.2)
-
Step 900
900
#2E4553
oklch(37.7% 0.037 235.8)
-
Step 950
950
#1B2830
oklch(26.9% 0.023 235.8)
#3E647B 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) | #59637C | 0.035 |
| Deuteranopia (no green cones) | #515D7B | 0.030 |
| Tritanopia (no blue cones) | #216A6C | 0.044 |
| Achromatopsia (no color) | #5F5F5F | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E647B
#3E647B
oklch(48.4% 0.057 236.2)
- #78573F
#78573F
oklch(48.5% 0.057 57)
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 #3E647B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.027
- Denim #3B638C ΔE 0.029
- YInMn Blue #415A77 ΔE 0.029
- Dusty Grape #545775 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.049
- Peacock Blue #016795 ΔE 0.051
- Dark Aqua #05696B ΔE 0.051
Use #3E647B 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.