#375E8B
Closest named color: Denim (#3B638C). oklch(47.4% 0.086 253.1), rgb(55, 94, 139).
Aa
White text reads best on this color (6.69:1).
About this color
#375E8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.086 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.016 away. White text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #375E8B |
| RGB | rgb(55, 94, 139) |
| HSL | hsl(212, 43%, 38%) |
| OKLCH | oklch(47.4% 0.086 253.1) |
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 #375E8B | 6.69:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #375E8B | 3.13:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #375E8B text on white | 6.69:1 | AA | Lc 82.9 | Fine for body text |
| #375E8B text on black | 3.13:1 | AA large text | Lc -19.0 | 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
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AEC3DB
oklch(80.9% 0.041 251.8)
-
Step 400
400
#83A3CA
oklch(70.6% 0.068 253.7)
-
Step 500
500
#648CBC
oklch(63% 0.085 253.5)
-
Step 600
600
#4B76A8
oklch(55.6% 0.092 253.1)
-
Step 700
700 (this color)
#375E8B
oklch(47.4% 0.086 253.1)
-
Step 800
800
#325175
oklch(42.8% 0.071 253.1)
-
Step 900
900
#2C435E
oklch(37.7% 0.055 253.1)
-
Step 950
950
#1A2737
oklch(26.9% 0.035 254.1)
#375E8B 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) | #4B608D | 0.026 |
| Deuteranopia (no green cones) | #40588A | 0.019 |
| Tritanopia (no blue cones) | #00686E | 0.072 |
| Achromatopsia (no color) | #5C5C5C | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E8B
#375E8B
oklch(47.4% 0.086 253.1)
- #79541C
#79541C
oklch(47.5% 0.086 73.7)
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 #375E8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.016
- Light Navy Blue #2E5A88 ΔE 0.016
- Denim Blue #3B5B92 ΔE 0.017
- Dusky Blue #475F94 ΔE 0.025
- YInMn Blue #415A77 ΔE 0.033
- Peacock Blue #016795 ΔE 0.036
- Dusk #4E5481 ΔE 0.038
- Dusk Blue #26538D ΔE 0.040
Use #375E8B 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.