#375A8F
Closest named color: Denim Blue (#3B5B92). oklch(46.7% 0.096 258.5), rgb(55, 90, 143).
Aa
White text reads best on this color (6.95:1).
About this color
#375A8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.096 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.007 away. White text reads best on it, at 6.95:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.02:1 |
| White text | 6.95:1 |
Values
| HEX | #375A8F |
| RGB | rgb(55, 90, 143) |
| HSL | hsl(216, 44%, 39%) |
| OKLCH | oklch(46.7% 0.096 258.5) |
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 #375A8F | 6.95:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #375A8F | 3.02:1 | AA large text | Lc 20.2 | Dividers and decoration only |
| #375A8F text on white | 6.95:1 | AA | Lc 83.9 | Fine for body text |
| #375A8F text on black | 3.02:1 | AA large text | Lc -18.1 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#84A2CF
oklch(70.6% 0.074 258.3)
-
Step 500
500
#668BC3
oklch(63.2% 0.095 258.5)
-
Step 600
600
#4D74AF
oklch(55.7% 0.102 258.4)
-
Step 700
700 (this color)
#375A8F
oklch(46.7% 0.096 258.5)
-
Step 800
800
#334F7A
oklch(42.6% 0.08 258.7)
-
Step 900
900
#2D4262
oklch(37.7% 0.061 258.6)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#375A8F 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) | #445E91 | 0.021 |
| Deuteranopia (no green cones) | #38568E | 0.011 |
| Tritanopia (no blue cones) | #00666D | 0.083 |
| Achromatopsia (no color) | #5A5A5A | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375A8F
#375A8F
oklch(46.7% 0.096 258.5)
- #775204
#775204
oklch(46.7% 0.096 78)
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 #375A8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.007
- Light Navy Blue #2E5A88 ΔE 0.015
- Dusky Blue #475F94 ΔE 0.026
- Dusk Blue #26538D ΔE 0.029
- Denim #3B638C ΔE 0.029
- Twilight #4E518B ΔE 0.036
- Dusk #4E5481 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.041
Use #375A8F 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.