#375E90
Closest named color: Denim Blue (#3B5B92). oklch(47.7% 0.093 255.3), rgb(55, 94, 144).
Aa
White text reads best on this color (6.63:1).
About this color
#375E90 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.093 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.011 away. White text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #375E90 |
| RGB | rgb(55, 94, 144) |
| HSL | hsl(214, 45%, 39%) |
| OKLCH | oklch(47.7% 0.093 255.3) |
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 #375E90 | 6.63:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #375E90 | 3.16:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #375E90 text on white | 6.63:1 | AA | Lc 82.6 | Fine for body text |
| #375E90 text on black | 3.16:1 | AA large text | Lc -19.3 | 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 700.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AEC3DE
oklch(81% 0.045 254.8)
-
Step 400
400
#83A3CD
oklch(70.7% 0.071 255.4)
-
Step 500
500
#638CC0
oklch(63.1% 0.091 254.8)
-
Step 600
600
#4A75AD
oklch(55.6% 0.1 255.5)
-
Step 700
700 (this color)
#375E90
oklch(47.7% 0.093 255.3)
-
Step 800
800
#315078
oklch(42.6% 0.076 255.4)
-
Step 900
900
#2B4361
oklch(37.8% 0.06 254.6)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#375E90 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) | #496192 | 0.024 |
| Deuteranopia (no green cones) | #3D598F | 0.015 |
| Tritanopia (no blue cones) | #006970 | 0.078 |
| Achromatopsia (no color) | #5D5D5D | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E90
#375E90
oklch(47.7% 0.093 255.3)
- #7B5412
#7B5412
oklch(47.7% 0.093 74.9)
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 #375E90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.011
- Denim #3B638C ΔE 0.019
- Light Navy Blue #2E5A88 ΔE 0.020
- Dusky Blue #475F94 ΔE 0.021
- Peacock Blue #016795 ΔE 0.035
- Dusk Blue #26538D ΔE 0.039
- YInMn Blue #415A77 ΔE 0.040
- Dusk #4E5481 ΔE 0.040
Use #375E90 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.