#377DF5
Closest named color: Clear Blue (#247AFD). oklch(61.1% 0.194 260.5), rgb(55, 125, 245).
Aa
Black text reads best on this color (5.41:1).
About this color
#377DF5 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.194 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.019 away. Black text reads best on it, at 5.41:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.41:1 |
| White text | 3.87:1 |
Values
| HEX | #377DF5 |
| RGB | rgb(55, 125, 245) |
| HSL | hsl(218, 90%, 59%) |
| OKLCH | oklch(61.1% 0.194 260.5) |
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 #377DF5 | 3.87:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #377DF5 | 5.41:1 | AA | Lc 38.3 | Non-text elements, placeholder text |
| #377DF5 text on white | 3.87:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #377DF5 text on black | 5.41:1 | AA | Lc -35.9 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9DC2FE
oklch(80.9% 0.094 259.9)
-
Step 400
400
#689FFE
oklch(70.7% 0.151 260.7)
-
Step 500
500 (this color)
#377DF5
oklch(61.1% 0.194 260.5)
-
Step 600
600
#1A69EB
oklch(55.6% 0.21 260.5)
-
Step 700
700
#0B56CD
oklch(49% 0.197 260.6)
-
Step 800
800
#0E48A5
oklch(42.7% 0.161 260.2)
-
Step 900
900
#143D83
oklch(37.6% 0.127 260.5)
-
Step 950
950
#0D254D
oklch(27.1% 0.08 260.1)
#377DF5 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) | #348BF9 | 0.035 |
| Deuteranopia (no green cones) | #0079F3 | 0.026 |
| Tritanopia (no blue cones) | #009AAD | 0.151 |
| Achromatopsia (no color) | #818181 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377DF5
#377DF5
oklch(61.1% 0.194 260.5)
- #AA7900
#AA7900
oklch(61% 0.126 80.2)
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 #377DF5, closest first.
No curated palette has a color within ΔE 0.04 of #377DF5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.019
- Dodger Blue #1E90FF ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.049
- Cornflower #6A79F7 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.057
- Soft Blue #6488EA ΔE 0.058
- Neon Blue #4361EE ΔE 0.066
Use #377DF5 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.