#256FA8
Closest named color: Flat Blue (#3C73A8). oklch(52.5% 0.115 246.1), rgb(37, 111, 168).
Aa
White text reads best on this color (5.36:1).
About this color
#256FA8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.115 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.023 away. White text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 3.91:1 |
| White text | 5.36:1 |
Values
| HEX | #256FA8 |
| RGB | rgb(37, 111, 168) |
| HSL | hsl(206, 64%, 40%) |
| OKLCH | oklch(52.5% 0.115 246.1) |
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 #256FA8 | 5.36:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #256FA8 | 3.91:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #256FA8 text on white | 5.36:1 | AA | Lc 76.3 | Fine for body text |
| #256FA8 text on black | 3.91:1 | AA large text | Lc -25.4 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A6C5E1
oklch(81% 0.052 245.8)
-
Step 400
400
#75A6D1
oklch(70.7% 0.082 245.8)
-
Step 500
500
#4F8FC5
oklch(63% 0.105 246)
-
Step 600
600 (this color)
#256FA8
oklch(52.5% 0.115 246.1)
-
Step 700
700
#226599
oklch(49.1% 0.106 246.1)
-
Step 800
800
#1E537C
oklch(42.8% 0.088 245.5)
-
Step 900
900
#1F4564
oklch(37.8% 0.069 245.7)
-
Step 950
950
#13283A
oklch(26.9% 0.043 246.2)
#256FA8 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) | #5571AA | 0.046 |
| Deuteranopia (no green cones) | #4265A7 | 0.034 |
| Tritanopia (no blue cones) | #007D84 | 0.082 |
| Achromatopsia (no color) | #6B6B6B | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256FA8
#256FA8
oklch(52.5% 0.115 246.1)
- #965A06
#965A06
oklch(52.4% 0.115 65.6)
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 #256FA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.023
- Muted Blue #3B719F ΔE 0.023
- Mid Blue #276AB3 ΔE 0.025
- Ocean Blue #03719C ΔE 0.026
- French Blue #436BAD ΔE 0.028
- Nice Blue #107AB0 ΔE 0.031
- Sea Blue #047495 ΔE 0.040
- Peacock Blue #016795 ΔE 0.041
Use #256FA8 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.