#275FBB
Closest named color: Mid Blue (#276AB3). oklch(50.1% 0.157 259.9), rgb(39, 95, 187).
Aa
White text reads best on this color (6.10:1).
About this color
#275FBB is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.157 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.034 away. White text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #275FBB |
| RGB | rgb(39, 95, 187) |
| HSL | hsl(217, 65%, 44%) |
| OKLCH | oklch(50.1% 0.157 259.9) |
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 #275FBB | 6.10:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #275FBB | 3.44:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #275FBB text on white | 6.10:1 | AA | Lc 80.0 | Fine for body text |
| #275FBB text on black | 3.44:1 | AA large text | Lc -21.8 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EAF9
oklch(93.5% 0.023 260.7)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A4C2F2
oklch(80.9% 0.076 259.7)
-
Step 400
400
#73A1EC
oklch(70.7% 0.121 259.8)
-
Step 500
500
#4E87E6
oklch(63.1% 0.156 260)
-
Step 600
600
#316FD4
oklch(55.6% 0.168 259.8)
-
Step 700
700 (this color)
#275FBB
oklch(50.1% 0.157 259.9)
-
Step 800
800
#1F4C95
oklch(42.8% 0.13 259.7)
-
Step 900
900
#1F4076
oklch(37.7% 0.1 259.8)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#275FBB 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) | #2969BE | 0.027 |
| Deuteranopia (no green cones) | #005CB9 | 0.021 |
| Tritanopia (no blue cones) | #007584 | 0.121 |
| Achromatopsia (no color) | #626262 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #275FBB
#275FBB
oklch(50.1% 0.157 259.9)
- #825B00
#825B00
oklch(50% 0.104 79.6)
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 #275FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.034
- French Blue #436BAD ΔE 0.052
- Warm Blue #4B57DB ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.066
- Dusky Blue #475F94 ΔE 0.068
- Royal Blue #4169E1 ΔE 0.070
- Iris #6258C4 ΔE 0.071
- Peacock Blue #016795 ΔE 0.071
Use #275FBB 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.