#3F8ECD
Closest named color: Water Blue (#0E87CC). oklch(62.6% 0.123 245.7), rgb(63, 142, 205).
Aa
Black text reads best on this color (5.96:1).
About this color
#3F8ECD is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.123 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.033 away. Black text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.96:1 |
| White text | 3.52:1 |
Values
| HEX | #3F8ECD |
| RGB | rgb(63, 142, 205) |
| HSL | hsl(207, 59%, 53%) |
| OKLCH | oklch(62.6% 0.123 245.7) |
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 #3F8ECD | 3.52:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #3F8ECD | 5.96:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #3F8ECD text on white | 3.52:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #3F8ECD text on black | 5.96:1 | AA | Lc -39.2 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A1C5E6
oklch(80.8% 0.061 246.3)
-
Step 400
400
#6CA7D9
oklch(70.8% 0.096 245.3)
-
Step 500
500 (this color)
#3F8ECD
oklch(62.6% 0.123 245.7)
-
Step 600
600
#1879BC
oklch(55.7% 0.133 245.6)
-
Step 700
700
#0465A2
oklch(49.1% 0.124 245.8)
-
Step 800
800
#0D5383
oklch(42.8% 0.102 245.5)
-
Step 900
900
#164569
oklch(37.8% 0.079 245.5)
-
Step 950
950
#0E283E
oklch(26.9% 0.052 246.9)
#3F8ECD 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) | #7290D0 | 0.052 |
| Deuteranopia (no green cones) | #5E82CC | 0.040 |
| Tritanopia (no blue cones) | #009DA4 | 0.090 |
| Achromatopsia (no color) | #888888 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8ECD
#3F8ECD
oklch(62.6% 0.123 245.7)
- #B97729
#B97729
oklch(62.6% 0.122 66)
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 #3F8ECD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.037
- Faded Blue #658CBB ΔE 0.042
- Steel Blue #4682B4 ΔE 0.045
- Off Blue #5684AE ΔE 0.050
- Blue NCS #118AB2 ΔE 0.051
- Dusty Blue #5A86AD ΔE 0.051
Use #3F8ECD 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.