#1376D1
Closest named color: Windows Blue (#3778BF). oklch(56.3% 0.163 252.5), rgb(19, 118, 209).
Aa
White text reads best on this color (4.62:1).
About this color
#1376D1 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.163 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.034 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #1376D1 |
| RGB | rgb(19, 118, 209) |
| HSL | hsl(209, 83%, 45%) |
| OKLCH | oklch(56.3% 0.163 252.5) |
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 #1376D1 | 4.62:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #1376D1 | 4.53:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #1376D1 text on white | 4.62:1 | AA | Lc 71.5 | Content text, not long reading |
| #1376D1 text on black | 4.53:1 | AA | Lc -30.2 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#69A4E8
oklch(70.7% 0.118 252.9)
-
Step 500
500
#3C8CE1
oklch(63.2% 0.15 252.5)
-
Step 600
600 (this color)
#1376D1
oklch(56.3% 0.163 252.5)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#064F91
oklch(42.6% 0.126 252.7)
-
Step 900
900
#134273
oklch(37.6% 0.098 252.8)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#1376D1 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) | #467DD5 | 0.041 |
| Deuteranopia (no green cones) | #1E6DCF | 0.023 |
| Tritanopia (no blue cones) | #008C99 | 0.120 |
| Achromatopsia (no color) | #757575 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1376D1
#1376D1
oklch(56.3% 0.163 252.5)
- #A06800
#A06800
oklch(56.4% 0.12 72.4)
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 #1376D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.034
- Water Blue #0E87CC ΔE 0.049
- Royal Blue #4169E1 ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.051
- Mid Blue #276AB3 ΔE 0.052
- Nice Blue #107AB0 ΔE 0.055
- French Blue #436BAD ΔE 0.062
- Flat Blue #3C73A8 ΔE 0.065
Use #1376D1 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.