#379BE3
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.5% 0.14 244.4), rgb(55, 155, 227).
Aa
Black text reads best on this color (6.96:1).
About this color
#379BE3 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.140 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.029 away. Black text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.96:1 |
| White text | 3.01:1 |
Values
| HEX | #379BE3 |
| RGB | rgb(55, 155, 227) |
| HSL | hsl(205, 75%, 55%) |
| OKLCH | oklch(66.5% 0.14 244.4) |
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 #379BE3 | 3.01:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #379BE3 | 6.96:1 | AA | Lc 47.5 | Large or bold text, headings |
| #379BE3 text on white | 3.01:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #379BE3 text on black | 6.96:1 | AA | Lc -45.3 | 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 500.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DDF1
oklch(88.6% 0.038 243.3)
-
Step 300
300
#9BC6EA
oklch(80.8% 0.069 244)
-
Step 400
400
#61A8E0
oklch(70.8% 0.109 244)
-
Step 500
500 (this color)
#379BE3
oklch(66.5% 0.14 244.4)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#03456E
oklch(37.6% 0.091 244.3)
-
Step 950
950
#082941
oklch(27.1% 0.058 244.7)
#379BE3 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) | #7A9DE6 | 0.061 |
| Deuteranopia (no green cones) | #628DE2 | 0.047 |
| Tritanopia (no blue cones) | #00ADB5 | 0.099 |
| Achromatopsia (no color) | #949494 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #379BE3
#379BE3
oklch(66.5% 0.14 244.4)
- #CE7E1F
#CE7E1F
oklch(66.4% 0.14 63.9)
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 #379BE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.043
- Dodger Blue #1E90FF ΔE 0.057
- Soft Blue #6488EA ΔE 0.061
- Water Blue #0E87CC ΔE 0.067
- Faded Blue #658CBB ΔE 0.069
- Cool Blue #4984B8 ΔE 0.080
Use #379BE3 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.