#3D9EEF
Closest named color: Chefchaouen Blue (#4895EF). oklch(68% 0.15 247.6), rgb(61, 158, 239).
Aa
Black text reads best on this color (7.33:1).
About this color
#3D9EEF is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.150 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.024 away. Black text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.33:1 |
| White text | 2.86:1 |
Values
| HEX | #3D9EEF |
| RGB | rgb(61, 158, 239) |
| HSL | hsl(207, 85%, 59%) |
| OKLCH | oklch(68% 0.15 247.6) |
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 #3D9EEF | 2.86:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #3D9EEF | 7.33:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #3D9EEF text on white | 2.86:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #3D9EEF text on black | 7.33:1 | AAA | Lc -47.4 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFC
oklch(93.6% 0.028 248.1)
-
Step 200
200
#BFDDFA
oklch(88.5% 0.051 247.5)
-
Step 300
300
#8FC6FA
oklch(80.8% 0.094 247.7)
-
Step 400
400 (this color)
#3D9EEF
oklch(68% 0.15 247.6)
-
Step 500
500
#008EE9
oklch(63.1% 0.169 247.8)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#002847
oklch(27% 0.072 247.4)
#3D9EEF 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) | #79A2F2 | 0.057 |
| Deuteranopia (no green cones) | #5F91ED | 0.040 |
| Tritanopia (no blue cones) | #00B1BB | 0.108 |
| Achromatopsia (no color) | #999999 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D9EEF
#3D9EEF
oklch(68% 0.15 247.6)
- #D48300
#D48300
oklch(68% 0.15 67.4)
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 #3D9EEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.043
- Dodger Blue #1E90FF ΔE 0.052
- Soft Blue #6488EA ΔE 0.061
- Water Blue #0E87CC ΔE 0.083
- Faded Blue #658CBB ΔE 0.083
- Periwinkle Blue #8F99FB ΔE 0.085
Use #3D9EEF 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.