#3789FF
Closest named color: Dodger Blue (#1E90FF). oklch(64.2% 0.193 258.2), rgb(55, 137, 255).
Aa
Black text reads best on this color (6.18:1).
About this color
#3789FF is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.193 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.019 away. Black text reads best on it, at 6.18:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.18:1 |
| White text | 3.39:1 |
Values
| HEX | #3789FF |
| RGB | rgb(55, 137, 255) |
| HSL | hsl(215, 100%, 61%) |
| OKLCH | oklch(64.2% 0.193 258.2) |
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 #3789FF | 3.39:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #3789FF | 6.18:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #3789FF text on white | 3.39:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #3789FF text on black | 6.18:1 | AA | Lc -40.8 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFC
oklch(88.5% 0.052 257.4)
-
Step 300
300
#9BC3FE
oklch(81% 0.094 258)
-
Step 400
400
#62A1FD
oklch(70.8% 0.15 257.8)
-
Step 500
500 (this color)
#3789FF
oklch(64.2% 0.193 258.2)
-
Step 600
600
#006BE9
oklch(55.5% 0.208 258.3)
-
Step 700
700
#005AC5
oklch(49.1% 0.183 258.1)
-
Step 800
800
#0049A4
oklch(42.7% 0.16 258.3)
-
Step 900
900
#0D3E82
oklch(37.6% 0.125 258.3)
-
Step 950
950
#0A254C
oklch(26.9% 0.079 258.2)
#3789FF 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) | #4895FF | 0.036 |
| Deuteranopia (no green cones) | #0483FD | 0.027 |
| Tritanopia (no blue cones) | #00A5B8 | 0.147 |
| Achromatopsia (no color) | #8B8B8B | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3789FF
#3789FF
oklch(64.2% 0.193 258.2)
- #B98100
#B98100
oklch(64.3% 0.134 78.1)
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 #3789FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.019
- Clear Blue #247AFD ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.045
- Soft Blue #6488EA ΔE 0.048
- Cornflower #6A79F7 ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.079
Use #3789FF 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.