#376CD9
Closest named color: Royal Blue (#4169E1). oklch(55.6% 0.177 262.6), rgb(55, 108, 217).
Aa
White text reads best on this color (4.87:1).
About this color
#376CD9 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.177 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.017 away. White text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.30:1 |
| White text | 4.87:1 |
Values
| HEX | #376CD9 |
| RGB | rgb(55, 108, 217) |
| HSL | hsl(220, 68%, 53%) |
| OKLCH | oklch(55.6% 0.177 262.6) |
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 #376CD9 | 4.87:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #376CD9 | 4.30:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #376CD9 text on white | 4.87:1 | AA | Lc 73.3 | Content text, not long reading |
| #376CD9 text on black | 4.30:1 | AA large text | Lc -28.4 | Dividers and decoration only |
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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A5C1F5
oklch(80.9% 0.08 262.6)
-
Step 400
400
#759FF0
oklch(70.6% 0.128 262.7)
-
Step 500
500
#5285EB
oklch(63.1% 0.163 262.6)
-
Step 600
600 (this color)
#376CD9
oklch(55.6% 0.177 262.6)
-
Step 700
700
#2A59BC
oklch(49% 0.165 262.8)
-
Step 800
800
#234A98
oklch(42.7% 0.136 262.3)
-
Step 900
900
#213E79
oklch(37.6% 0.107 262.7)
-
Step 950
950
#142547
oklch(27% 0.067 262.7)
#376CD9 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) | #2879DD | 0.033 |
| Deuteranopia (no green cones) | #006AD7 | 0.028 |
| Tritanopia (no blue cones) | #008698 | 0.139 |
| Achromatopsia (no color) | #717171 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #376CD9
#376CD9
oklch(55.6% 0.177 262.6)
- #946C00
#946C00
oklch(55.7% 0.115 82.9)
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 #376CD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.017
- Cerulean Blue #056EEE ΔE 0.038
- Neon Blue #4361EE ΔE 0.043
- Warm Blue #4B57DB ΔE 0.051
- Azul #1D5DEC ΔE 0.053
- Windows Blue #3778BF ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.059
- Clear Blue #247AFD ΔE 0.061
Use #376CD9 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.