#375578
Closest named color: YInMn Blue (#415A77). oklch(44.2% 0.068 253.1), rgb(55, 85, 120).
Aa
White text reads best on this color (7.68:1).
About this color
#375578 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.068 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #375578 |
| RGB | rgb(55, 85, 120) |
| HSL | hsl(212, 37%, 34%) |
| OKLCH | oklch(44.2% 0.068 253.1) |
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 #375578 | 7.68:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #375578 | 2.73:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #375578 text on white | 7.68:1 | AAA | Lc 86.6 | Fine for body text |
| #375578 text on black | 2.73:1 | Fails | Lc -15.5 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#85A3C8
oklch(70.6% 0.064 253.9)
-
Step 500
500
#668CBA
oklch(63% 0.082 253.7)
-
Step 600
600
#4C76A6
oklch(55.6% 0.089 252.7)
-
Step 700
700
#3D638E
oklch(49.1% 0.082 252.5)
-
Step 800
800 (this color)
#375578
oklch(44.2% 0.068 253.1)
-
Step 900
900
#2D435D
oklch(37.7% 0.053 253.2)
-
Step 950
950
#1A2737
oklch(26.9% 0.035 254.1)
#375578 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) | #47577A | 0.023 |
| Deuteranopia (no green cones) | #3F5077 | 0.017 |
| Tritanopia (no blue cones) | #155D61 | 0.060 |
| Achromatopsia (no color) | #535353 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375578
#375578
oklch(44.2% 0.068 253.1)
- #6A4D25
#6A4D25
oklch(44.3% 0.068 73.2)
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 #375578, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.027
- Dusk #4E5481 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.040
- Dusk Blue #26538D ΔE 0.040
- Dusty Grape #545775 ΔE 0.041
- Light Navy #155084 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.044
Use #375578 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.