#375D9E
Closest named color: Denim Blue (#3B5B92). oklch(48.3% 0.114 260.5), rgb(55, 93, 158).
Aa
White text reads best on this color (6.51:1).
About this color
#375D9E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.114 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.019 away. White text reads best on it, at 6.51:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #375D9E |
| RGB | rgb(55, 93, 158) |
| HSL | hsl(218, 48%, 42%) |
| OKLCH | oklch(48.3% 0.114 260.5) |
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 #375D9E | 6.51:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #375D9E | 3.22:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #375D9E text on white | 6.51:1 | AA | Lc 82.1 | Fine for body text |
| #375D9E text on black | 3.22:1 | AA large text | Lc -19.8 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ADC2E5
oklch(81% 0.055 260.6)
-
Step 400
400
#81A1D8
oklch(70.6% 0.089 261)
-
Step 500
500
#6189CD
oklch(63% 0.112 260.6)
-
Step 600
600
#4872BA
oklch(55.6% 0.122 260.5)
-
Step 700
700 (this color)
#375D9E
oklch(48.3% 0.114 260.5)
-
Step 800
800
#304E82
oklch(42.7% 0.094 260.7)
-
Step 900
900
#2A4168
oklch(37.6% 0.073 260.4)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#375D9E 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) | #4063A1 | 0.021 |
| Deuteranopia (no green cones) | #31599D | 0.014 |
| Tritanopia (no blue cones) | #006C76 | 0.094 |
| Achromatopsia (no color) | #5E5E5E | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375D9E
#375D9E
oklch(48.3% 0.114 260.5)
- #7B5700
#7B5700
oklch(48.3% 0.1 80.7)
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 #375D9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.019
- Dusky Blue #475F94 ΔE 0.026
- Denim #3B638C ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.038
- Dusk Blue #26538D ΔE 0.043
- Peacock Blue #016795 ΔE 0.044
- Mid Blue #276AB3 ΔE 0.044
- Twilight #4E518B ΔE 0.046
Use #375D9E 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.