#377CFE
Closest named color: Clear Blue (#247AFD). oklch(61.5% 0.206 261.6), rgb(55, 124, 254).
Aa
Black text reads best on this color (5.47:1).
About this color
#377CFE is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.206 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.013 away. Black text reads best on it, at 5.47:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.206) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #377CFE |
| RGB | rgb(55, 124, 254) |
| HSL | hsl(219, 99%, 61%) |
| OKLCH | oklch(61.5% 0.206 261.6) |
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 #377CFE | 3.83:1 | AA large text | Lc -70.8 | Content text, not long reading |
| Black text on #377CFE | 5.47:1 | AA | Lc 38.8 | Non-text elements, placeholder text |
| #377CFE text on white | 3.83:1 | AA large text | Lc 65.3 | Content text, not long reading |
| #377CFE text on black | 5.47:1 | AA | Lc -36.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699EFF
oklch(70.6% 0.153 261.6)
-
Step 500
500 (this color)
#377CFE
oklch(61.5% 0.206 261.6)
-
Step 600
600
#1966F3
oklch(55.6% 0.224 261.5)
-
Step 700
700
#0B53D4
oklch(49.1% 0.209 261.6)
-
Step 800
800
#0E45AB
oklch(42.6% 0.173 261.6)
-
Step 900
900
#143C87
oklch(37.7% 0.134 261.5)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#377CFE 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) | #218CFF | 0.039 |
| Deuteranopia (no green cones) | #007AFB | 0.024 |
| Tritanopia (no blue cones) | #009CB1 | 0.161 |
| Achromatopsia (no color) | #828282 | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377CFE
#377CFE
oklch(61.5% 0.206 261.6)
- #AB7B00
#AB7B00
oklch(61.5% 0.127 81.1)
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 #377CFE, closest first.
No curated palette has a color within ΔE 0.04 of #377CFE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.013
- Dodger Blue #1E90FF ΔE 0.049
- Cornflower #6A79F7 ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.051
- Royal Blue #4169E1 ΔE 0.061
- Soft Blue #6488EA ΔE 0.064
- Bright Blue #0165FC ΔE 0.065
- Neon Blue #4361EE ΔE 0.066
Use #377CFE 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.