#375DA9
Closest named color: Denim Blue (#3B5B92). oklch(49% 0.129 262.6), rgb(55, 93, 169).
Aa
White text reads best on this color (6.36:1).
About this color
#375DA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.129 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.037 away. White text reads best on it, at 6.36:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.30:1 |
| White text | 6.36:1 |
Values
| HEX | #375DA9 |
| RGB | rgb(55, 93, 169) |
| HSL | hsl(220, 51%, 44%) |
| OKLCH | oklch(49% 0.129 262.6) |
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 #375DA9 | 6.36:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #375DA9 | 3.30:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #375DA9 text on white | 6.36:1 | AA | Lc 81.4 | Fine for body text |
| #375DA9 text on black | 3.30:1 | AA large text | Lc -20.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7FA0DF
oklch(70.6% 0.1 262.8)
-
Step 500
500
#5F88D7
oklch(63.2% 0.128 262.5)
-
Step 600
600
#4670C4
oklch(55.7% 0.139 262.7)
-
Step 700
700 (this color)
#375DA9
oklch(49% 0.129 262.6)
-
Step 800
800
#2E4C89
oklch(42.6% 0.108 262.9)
-
Step 900
900
#29406E
oklch(37.7% 0.084 262.9)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#375DA9 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) | #3865AC | 0.022 |
| Deuteranopia (no green cones) | #245AA7 | 0.020 |
| Tritanopia (no blue cones) | #006F7B | 0.106 |
| Achromatopsia (no color) | #5F5F5F | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375DA9
#375DA9
oklch(49% 0.129 262.6)
- #7C5A00
#7C5A00
oklch(49% 0.101 82.9)
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 #375DA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.037
- Mid Blue #276AB3 ΔE 0.037
- Dusky Blue #475F94 ΔE 0.039
- French Blue #436BAD ΔE 0.043
- Denim #3B638C ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.055
- Peacock Blue #016795 ΔE 0.055
- Dusk Blue #26538D ΔE 0.055
Use #375DA9 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.