#375C91
Closest named color: Denim Blue (#3B5B92). oklch(47.3% 0.096 257.5), rgb(55, 92, 145).
Aa
White text reads best on this color (6.76:1).
About this color
#375C91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.096 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.005 away. White text reads best on it, at 6.76:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.10:1 |
| White text | 6.76:1 |
Values
| HEX | #375C91 |
| RGB | rgb(55, 92, 145) |
| HSL | hsl(215, 45%, 39%) |
| OKLCH | oklch(47.3% 0.096 257.5) |
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 #375C91 | 6.76:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #375C91 | 3.10:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #375C91 text on white | 6.76:1 | AA | Lc 83.2 | Fine for body text |
| #375C91 text on black | 3.10:1 | AA large text | Lc -18.8 | 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
#AEC2DF
oklch(80.8% 0.047 257.6)
-
Step 400
400
#83A2CF
oklch(70.6% 0.075 257.6)
-
Step 500
500
#648BC3
oklch(63.1% 0.096 257.4)
-
Step 600
600
#4B74AF
oklch(55.6% 0.103 257.5)
-
Step 700
700 (this color)
#375C91
oklch(47.3% 0.096 257.5)
-
Step 800
800
#32507A
oklch(42.8% 0.079 257)
-
Step 900
900
#2C4262
oklch(37.6% 0.062 257.7)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#375C91 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) | #466093 | 0.023 |
| Deuteranopia (no green cones) | #395790 | 0.014 |
| Tritanopia (no blue cones) | #00686F | 0.082 |
| Achromatopsia (no color) | #5B5B5B | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375C91
#375C91
oklch(47.3% 0.096 257.5)
- #795306
#795306
oklch(47.2% 0.096 77.3)
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 #375C91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.005
- Light Navy Blue #2E5A88 ΔE 0.019
- Dusky Blue #475F94 ΔE 0.022
- Denim #3B638C ΔE 0.025
- Dusk Blue #26538D ΔE 0.034
- Dusk #4E5481 ΔE 0.039
- Twilight #4E518B ΔE 0.039
- Peacock Blue #016795 ΔE 0.039
Use #375C91 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.