#377DEC
Closest named color: Clear Blue (#247AFD). oklch(60.5% 0.182 259.4), rgb(55, 125, 236).
Aa
Black text reads best on this color (5.30:1).
About this color
#377DEC is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.182 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.029 away. Black text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #377DEC |
| RGB | rgb(55, 125, 236) |
| HSL | hsl(217, 83%, 57%) |
| OKLCH | oklch(60.5% 0.182 259.4) |
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 #377DEC | 3.95:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #377DEC | 5.30:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #377DEC text on white | 3.95:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #377DEC text on black | 5.30:1 | AA | Lc -35.2 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9FC2FA
oklch(80.9% 0.088 259.7)
-
Step 400
400
#69A0F8
oklch(70.6% 0.142 259.4)
-
Step 500
500 (this color)
#377DEC
oklch(60.5% 0.182 259.4)
-
Step 600
600
#1C6CE4
oklch(55.6% 0.197 259.4)
-
Step 700
700
#0D59C6
oklch(49.1% 0.184 259.4)
-
Step 800
800
#1049A0
oklch(42.6% 0.153 259.6)
-
Step 900
900
#163F7F
oklch(37.8% 0.118 259.3)
-
Step 950
950
#0E254A
oklch(26.9% 0.075 259.5)
#377DEC 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) | #3F89F0 | 0.033 |
| Deuteranopia (no green cones) | #0078EA | 0.028 |
| Tritanopia (no blue cones) | #0097A9 | 0.140 |
| Achromatopsia (no color) | #808080 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377DEC
#377DEC
oklch(60.5% 0.182 259.4)
- #A97700
#A97700
oklch(60.4% 0.125 79.2)
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 #377DEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.029
- Cerulean Blue #056EEE ΔE 0.048
- Royal Blue #4169E1 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.052
- Cornflower #6A79F7 ΔE 0.054
- Soft Blue #6488EA ΔE 0.055
- Water Blue #0E87CC ΔE 0.062
Use #377DEC 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.