#377CFA
Closest named color: Clear Blue (#247AFD). oklch(61.2% 0.201 261.2), rgb(55, 124, 250).
Aa
Black text reads best on this color (5.42:1).
About this color
#377CFA is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.201 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.014 away. Black text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.42:1 |
| White text | 3.87:1 |
Values
| HEX | #377CFA |
| RGB | rgb(55, 124, 250) |
| HSL | hsl(219, 95%, 60%) |
| OKLCH | oklch(61.2% 0.201 261.2) |
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 #377CFA | 3.87:1 | AA large text | Lc -71.1 | Content text, not long reading |
| Black text on #377CFA | 5.42:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #377CFA text on white | 3.87:1 | AA large text | Lc 65.6 | Content text, not long reading |
| #377CFA text on black | 5.42:1 | AA | Lc -36.0 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500 (this color)
#377CFA
oklch(61.2% 0.201 261.2)
-
Step 600
600
#1A67F0
oklch(55.6% 0.219 261.2)
-
Step 700
700
#0C55D1
oklch(49.2% 0.203 261.1)
-
Step 800
800
#0F46A9
oklch(42.7% 0.169 261.3)
-
Step 900
900
#143C86
oklch(37.6% 0.132 261.4)
-
Step 950
950
#0D244E
oklch(27% 0.083 261.2)
#377CFA 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) | #298BFF | 0.037 |
| Deuteranopia (no green cones) | #0079F8 | 0.025 |
| Tritanopia (no blue cones) | #009BAF | 0.157 |
| Achromatopsia (no color) | #818181 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377CFA
#377CFA
oklch(61.2% 0.201 261.2)
- #AA7A00
#AA7A00
oklch(61.2% 0.126 81)
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 #377CFA, closest first.
No curated palette has a color within ΔE 0.04 of #377CFA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.014
- Cerulean Blue #056EEE ΔE 0.049
- Dodger Blue #1E90FF ΔE 0.049
- Cornflower #6A79F7 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.057
- Soft Blue #6488EA ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.063
- Neon Blue #4361EE ΔE 0.064
Use #377CFA 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.