#377290
Closest named color: Sea Blue (#047495). oklch(52.6% 0.077 233), rgb(55, 114, 144).
Aa
White text reads best on this color (5.28:1).
About this color
#377290 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.077 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.024 away. White text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #377290 |
| RGB | rgb(55, 114, 144) |
| HSL | hsl(200, 45%, 39%) |
| OKLCH | oklch(52.6% 0.077 233) |
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 #377290 | 5.28:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #377290 | 3.97:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #377290 text on white | 5.28:1 | AA | Lc 76.1 | Fine for body text |
| #377290 text on black | 3.97:1 | AA large text | Lc -25.6 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7EA7BE
oklch(70.7% 0.056 233.1)
-
Step 500
500
#5C91AE
oklch(63.1% 0.071 233.5)
-
Step 600
600 (this color)
#377290
oklch(52.6% 0.077 233)
-
Step 700
700
#326883
oklch(49.2% 0.072 232.5)
-
Step 800
800
#2A556A
oklch(42.8% 0.059 231.6)
-
Step 900
900
#274656
oklch(37.7% 0.046 232.3)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#377290 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) | #637191 | 0.050 |
| Deuteranopia (no green cones) | #576890 | 0.043 |
| Tritanopia (no blue cones) | #007A7C | 0.053 |
| Achromatopsia (no color) | #6C6C6C | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #377290
#377290
oklch(52.6% 0.077 233)
- #8E5E3F
#8E5E3F
oklch(52.7% 0.077 53.2)
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 #377290, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.024
- Metallic Blue #4F738E ΔE 0.025
- Muted Blue #3B719F ΔE 0.026
- Dull Blue #49759C ΔE 0.028
- Ocean Blue #03719C ΔE 0.031
- Ocean #017B92 ΔE 0.033
- Cerulean #457B9D ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.039
Use #377290 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.