#37576F
Closest named color: YInMn Blue (#415A77). oklch(44.2% 0.055 241.9), rgb(55, 87, 111).
Aa
White text reads best on this color (7.62:1).
About this color
#37576F is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.055 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.020 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #37576F |
| RGB | rgb(55, 87, 111) |
| HSL | hsl(206, 34%, 33%) |
| OKLCH | oklch(44.2% 0.055 241.9) |
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 #37576F | 7.62:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #37576F | 2.75:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #37576F text on white | 7.62:1 | AAA | Lc 86.4 | Fine for body text |
| #37576F text on black | 2.75:1 | Fails | Lc -15.7 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D4
oklch(81% 0.032 240.7)
-
Step 400
400
#85A5BE
oklch(70.7% 0.051 242)
-
Step 500
500
#668FAE
oklch(63.2% 0.065 241.7)
-
Step 600
600
#4C799A
oklch(55.7% 0.071 241.5)
-
Step 700
700
#3D6583
oklch(49% 0.066 242.2)
-
Step 800
800 (this color)
#37576F
oklch(44.2% 0.055 241.9)
-
Step 900
900
#2D4456
oklch(37.6% 0.042 242.8)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#37576F 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) | #4D5770 | 0.029 |
| Deuteranopia (no green cones) | #45516F | 0.024 |
| Tritanopia (no blue cones) | #1D5D5F | 0.045 |
| Achromatopsia (no color) | #545454 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37576F
#37576F
oklch(44.2% 0.055 241.9)
- #694C33
#694C33
oklch(44.1% 0.055 61.5)
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 #37576F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.040
- Dusty Grape #545775 ΔE 0.042
- Petrol #005F6A ΔE 0.043
- Dusk #4E5481 ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.050
- Denim #3B638C ΔE 0.054
- Light Navy #155084 ΔE 0.055
Use #37576F 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.