#378CAC
Closest named color: Blue NCS (#118AB2). oklch(60.2% 0.094 226.6), rgb(55, 140, 172).
Aa
Black text reads best on this color (5.50:1).
About this color
#378CAC is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.094 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.021 away. Black text reads best on it, at 5.50:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #378CAC |
| RGB | rgb(55, 140, 172) |
| HSL | hsl(196, 52%, 45%) |
| OKLCH | oklch(60.2% 0.094 226.6) |
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 #378CAC | 3.81:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #378CAC | 5.50:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #378CAC text on white | 3.81:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #378CAC text on black | 5.50:1 | AA | Lc -36.3 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A2C7D8
oklch(80.8% 0.046 227.5)
-
Step 400
400
#6DAAC4
oklch(70.6% 0.074 226.9)
-
Step 500
500 (this color)
#378CAC
oklch(60.2% 0.094 226.6)
-
Step 600
600
#157FA1
oklch(55.7% 0.102 226.2)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#0A5770
oklch(42.7% 0.079 226.8)
-
Step 900
900
#15485B
oklch(37.7% 0.062 227)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#378CAC 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) | #7B89AE | 0.071 |
| Deuteranopia (no green cones) | #6B7DAC | 0.063 |
| Tritanopia (no blue cones) | #009596 | 0.054 |
| Achromatopsia (no color) | #838383 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378CAC
#378CAC
oklch(60.2% 0.094 226.6)
- #AF6F4F
#AF6F4F
oklch(60.3% 0.094 47)
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 #378CAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.021
- Teal Blue #01889F ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.034
- Off Blue #5684AE ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
- Cerulean #457B9D ΔE 0.048
- Teal Green #0A9396 ΔE 0.050
Use #378CAC 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.