#3DAEFB
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.2% 0.15 243.1), rgb(61, 174, 251).
Aa
Black text reads best on this color (8.64:1).
About this color
#3DAEFB is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.150 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.045 away. Black text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.64:1 |
| White text | 2.42:1 |
Values
| HEX | #3DAEFB |
| RGB | rgb(61, 174, 251) |
| HSL | hsl(204, 96%, 61%) |
| OKLCH | oklch(72.2% 0.15 243.1) |
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 #3DAEFB | 2.42:1 | Fails | Lc -52.4 | Large or bold text, headings |
| Black text on #3DAEFB | 8.64:1 | AAA | Lc 56.6 | Large or bold text, headings |
| #3DAEFB text on white | 2.42:1 | Fails | Lc 47.4 | Large or bold text, headings |
| #3DAEFB text on black | 8.64:1 | AAA | Lc -54.6 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DBECFB
oklch(93.5% 0.027 244.7)
-
Step 200
200
#BCDEF9
oklch(88.5% 0.052 242.2)
-
Step 300
300
#8AC8F9
oklch(80.9% 0.094 243.1)
-
Step 400
400 (this color)
#3DAEFB
oklch(72.2% 0.15 243.1)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00466E
oklch(37.8% 0.091 242.8)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#3DAEFB 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) | #8AB0FE | 0.069 |
| Deuteranopia (no green cones) | #709EFA | 0.054 |
| Tritanopia (no blue cones) | #00C1C9 | 0.105 |
| Achromatopsia (no color) | #A6A6A6 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3DAEFB
#3DAEFB
oklch(72.2% 0.15 243.1)
- #E68D2B
#E68D2B
oklch(72.2% 0.15 62.7)
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 #3DAEFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.066
- Cornflower Blue #6495ED ΔE 0.067
- Carolina Blue #8AB8FE ΔE 0.075
- Bright Sky Blue #02CCFE ΔE 0.080
- Vivid Sky Blue #4CC9F0 ΔE 0.082
- Dodger Blue #1E90FF ΔE 0.086
- Dark Sky Blue #448EE4 ΔE 0.086
Use #3DAEFB 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.