#015FBB
Closest named color: Mid Blue (#276AB3). oklch(49.4% 0.163 255.2), rgb(1, 95, 187).
Aa
White text reads best on this color (6.25:1).
About this color
#015FBB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.163 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.040 away. White text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #015FBB |
| RGB | rgb(1, 95, 187) |
| HSL | hsl(210, 99%, 37%) |
| OKLCH | oklch(49.4% 0.163 255.2) |
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 #015FBB | 6.25:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #015FBB | 3.35:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #015FBB text on white | 6.25:1 | AA | Lc 80.4 | Fine for body text |
| #015FBB text on black | 3.35:1 | AA large text | Lc -21.4 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9FC3F4
oklch(80.8% 0.08 256.2)
-
Step 400
400
#68A3EE
oklch(70.7% 0.127 255.1)
-
Step 500
500
#3C8AE8
oklch(63.1% 0.161 255)
-
Step 600
600
#1271D7
oklch(55.6% 0.176 255.3)
-
Step 700
700 (this color)
#015FBB
oklch(49.4% 0.163 255.2)
-
Step 800
800
#094D97
oklch(42.7% 0.136 255.5)
-
Step 900
900
#134178
oklch(37.7% 0.106 255.4)
-
Step 950
950
#0D2746
oklch(27.1% 0.066 254.6)
#015FBB 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) | #2568BE | 0.031 |
| Deuteranopia (no green cones) | #0059B9 | 0.016 |
| Tritanopia (no blue cones) | #007684 | 0.123 |
| Achromatopsia (no color) | #606060 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #015FBB
#015FBB
oklch(49.4% 0.163 255.2)
- #835700
#835700
oklch(49.3% 0.104 75)
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 #015FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.040
- French Blue #436BAD ΔE 0.062
- Peacock Blue #016795 ΔE 0.069
- Denim Blue #3B5B92 ΔE 0.070
- Blue Blue #2242C7 ΔE 0.071
- Warm Blue #4B57DB ΔE 0.075
- Dusky Blue #475F94 ΔE 0.076
- Dusk Blue #26538D ΔE 0.076
Use #015FBB 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.