#375971
Closest named color: YInMn Blue (#415A77). oklch(44.8% 0.056 240.4), rgb(55, 89, 113).
Aa
White text reads best on this color (7.42:1).
About this color
#375971 is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.056 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.017 away. White text reads best on it, at 7.42:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #375971 |
| RGB | rgb(55, 89, 113) |
| HSL | hsl(205, 35%, 33%) |
| OKLCH | oklch(44.8% 0.056 240.4) |
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 #375971 | 7.42:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #375971 | 2.82:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #375971 text on white | 7.42:1 | AAA | Lc 85.7 | Fine for body text |
| #375971 text on black | 2.82:1 | Fails | Lc -16.3 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D4
oklch(80.9% 0.033 239.5)
-
Step 400
400
#84A5BE
oklch(70.6% 0.052 241.1)
-
Step 500
500
#648FAE
oklch(63.1% 0.066 240.5)
-
Step 600
600
#4A799A
oklch(55.6% 0.073 240.4)
-
Step 700
700
#3B6683
oklch(49.2% 0.067 239.6)
-
Step 800
800 (this color)
#375971
oklch(44.8% 0.056 240.4)
-
Step 900
900
#2C4557
oklch(37.8% 0.044 240.7)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#375971 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) | #4E5972 | 0.030 |
| Deuteranopia (no green cones) | #475371 | 0.026 |
| Tritanopia (no blue cones) | #1B5F61 | 0.045 |
| Achromatopsia (no color) | #555555 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375971
#375971
oklch(44.8% 0.056 240.4)
- #6C4D34
#6C4D34
oklch(44.7% 0.056 59.5)
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 #375971, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.017
- Light Navy Blue #2E5A88 ΔE 0.038
- Dusty Grape #545775 ΔE 0.040
- Petrol #005F6A ΔE 0.042
- Dusk #4E5481 ΔE 0.046
- Denim #3B638C ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.051
- Slate #516572 ΔE 0.053
Use #375971 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.