#375567
Closest named color: YInMn Blue (#415A77). oklch(43.4% 0.046 235.7), rgb(55, 85, 103).
Aa
White text reads best on this color (7.90:1).
About this color
#375567 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.046 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.032 away. White text reads best on it, at 7.90:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #375567 |
| RGB | rgb(55, 85, 103) |
| HSL | hsl(203, 30%, 31%) |
| OKLCH | oklch(43.4% 0.046 235.7) |
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 #375567 | 7.90:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #375567 | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #375567 text on white | 7.90:1 | AAA | Lc 87.3 | Fine for body text |
| #375567 text on black | 2.65:1 | Fails | Lc -14.8 | Not readable |
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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B1C4D0
oklch(81% 0.027 235.4)
-
Step 400
400
#87A5B8
oklch(70.6% 0.043 236)
-
Step 500
500
#698FA7
oklch(63.1% 0.056 236.5)
-
Step 600
600
#507992
oklch(55.6% 0.06 236.1)
-
Step 700
700
#40667C
oklch(49.1% 0.056 234.9)
-
Step 800
800 (this color)
#375567
oklch(43.4% 0.046 235.7)
-
Step 900
900
#2F4552
oklch(37.8% 0.035 234.9)
-
Step 950
950
#1C2830
oklch(26.9% 0.022 237.9)
#375567 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) | #4D5468 | 0.030 |
| Deuteranopia (no green cones) | #464F67 | 0.026 |
| Tritanopia (no blue cones) | #235A5B | 0.036 |
| Achromatopsia (no color) | #515151 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375567
#375567
oklch(43.4% 0.046 235.7)
- #654A38
#654A38
oklch(43.3% 0.046 54.8)
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 #375567, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.032
- Petrol #005F6A ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.043
- Deep Teal #00555A ΔE 0.047
- Dusty Grape #545775 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.053
- Dusk #4E5481 ΔE 0.056
Use #375567 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.