#375A70
Closest named color: YInMn Blue (#415A77). oklch(45% 0.054 237.3), rgb(55, 90, 112).
Aa
White text reads best on this color (7.34:1).
About this color
#375A70 is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.054 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.018 away. White text reads best on it, at 7.34:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.85:1 |
| White text | 7.34:1 |
Values
| HEX | #375A70 |
| RGB | rgb(55, 90, 112) |
| HSL | hsl(203, 34%, 33%) |
| OKLCH | oklch(45% 0.054 237.3) |
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 #375A70 | 7.34:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #375A70 | 2.85:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #375A70 text on white | 7.34:1 | AAA | Lc 85.4 | Fine for body text |
| #375A70 text on black | 2.85:1 | Fails | Lc -16.6 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D3
oklch(80.8% 0.032 237.7)
-
Step 400
400
#83A6BD
oklch(70.7% 0.051 237.2)
-
Step 500
500
#6390AC
oklch(63.2% 0.065 236.5)
-
Step 600
600
#497A98
oklch(55.7% 0.071 236.8)
-
Step 700
700
#3A6681
oklch(49% 0.065 237.1)
-
Step 800
800 (this color)
#375A70
oklch(45% 0.054 237.3)
-
Step 900
900
#2B4555
oklch(37.6% 0.042 236.5)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#375A70 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) | #505971 | 0.033 |
| Deuteranopia (no green cones) | #485370 | 0.029 |
| Tritanopia (no blue cones) | #1B6061 | 0.044 |
| Achromatopsia (no color) | #565656 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375A70
#375A70
oklch(45% 0.054 237.3)
- #6D4E37
#6D4E37
oklch(45.1% 0.055 57.4)
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 #375A70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.018
- Petrol #005F6A ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.040
- Dusty Grape #545775 ΔE 0.041
- Dusk #4E5481 ΔE 0.048
- Denim #3B638C ΔE 0.049
- Slate #516572 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.053
Use #375A70 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.