#375AB3
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.147 265.2), rgb(55, 90, 179).
Aa
White text reads best on this color (6.41:1).
About this color
#375AB3 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.147 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.043 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #375AB3 |
| RGB | rgb(55, 90, 179) |
| HSL | hsl(223, 53%, 46%) |
| OKLCH | oklch(49.1% 0.147 265.2) |
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 #375AB3 | 6.41:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #375AB3 | 3.27:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #375AB3 text on white | 6.41:1 | AA | Lc 81.5 | Fine for body text |
| #375AB3 text on black | 3.27:1 | AA large text | Lc -20.4 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#AAC0F0
oklch(80.8% 0.072 265.6)
-
Step 400
400
#7E9FE8
oklch(70.8% 0.114 265.1)
-
Step 500
500
#5E85E1
oklch(63.1% 0.145 265.2)
-
Step 600
600
#456DCF
oklch(55.7% 0.158 265)
-
Step 700
700 (this color)
#375AB3
oklch(49.1% 0.147 265.2)
-
Step 800
800
#2E4A91
oklch(42.7% 0.122 265.4)
-
Step 900
900
#293F74
oklch(37.9% 0.095 265.2)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#375AB3 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) | #2865B6 | 0.030 |
| Deuteranopia (no green cones) | #0059B1 | 0.034 |
| Tritanopia (no blue cones) | #006F7E | 0.120 |
| Achromatopsia (no color) | #5F5F5F | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375AB3
#375AB3
oklch(49.1% 0.147 265.2)
- #7A5B00
#7A5B00
oklch(49% 0.1 85.4)
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 #375AB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.043
- French Blue #436BAD ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.054
- Dusky Blue #475F94 ΔE 0.057
- Iris #6258C4 ΔE 0.063
- Dusk Blue #26538D ΔE 0.066
- Warm Blue #4B57DB ΔE 0.068
- Twilight #4E518B ΔE 0.069
Use #375AB3 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.