#377FFF
Closest named color: Clear Blue (#247AFD). oklch(62.2% 0.204 260.9), rgb(55, 127, 255).
Aa
Black text reads best on this color (5.64:1).
About this color
#377FFF is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.204 and its hue 261°. 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 5.64:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.64:1 |
| White text | 3.72:1 |
Values
| HEX | #377FFF |
| RGB | rgb(55, 127, 255) |
| HSL | hsl(218, 100%, 61%) |
| OKLCH | oklch(62.2% 0.204 260.9) |
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 #377FFF | 3.72:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #377FFF | 5.64:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #377FFF text on white | 3.72:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #377FFF text on black | 5.64:1 | AA | Lc -37.4 | 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
#9EC2FF
oklch(81% 0.095 260.8)
-
Step 400
400
#689FFF
oklch(70.7% 0.153 260.8)
-
Step 500
500 (this color)
#377FFF
oklch(62.2% 0.204 260.9)
-
Step 600
600
#1567F2
oklch(55.6% 0.222 260.9)
-
Step 700
700
#0554D3
oklch(49.1% 0.207 261)
-
Step 800
800
#0B46AA
oklch(42.7% 0.171 260.9)
-
Step 900
900
#123C87
oklch(37.7% 0.134 261)
-
Step 950
950
#0C244F
oklch(27% 0.085 261)
#377FFF 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) | #2B8EFF | 0.037 |
| Deuteranopia (no green cones) | #007CFC | 0.024 |
| Tritanopia (no blue cones) | #009EB3 | 0.158 |
| Achromatopsia (no color) | #848484 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377FFF
#377FFF
oklch(62.2% 0.204 260.9)
- #AE7D00
#AE7D00
oklch(62.2% 0.129 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 #377FFF, closest first.
No curated palette has a color within ΔE 0.04 of #377FFF.
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 0.042
- Cornflower #6A79F7 ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.058
- Soft Blue #6488EA ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.068
Use #377FFF 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.