#2570BD
Closest named color: Mid Blue (#276AB3). oklch(54% 0.14 252.6), rgb(37, 112, 189).
Aa
White text reads best on this color (5.08:1).
About this color
#2570BD is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.140 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.021 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.13:1 |
| White text | 5.08:1 |
Values
| HEX | #2570BD |
| RGB | rgb(37, 112, 189) |
| HSL | hsl(210, 67%, 44%) |
| OKLCH | oklch(54% 0.14 252.6) |
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 #2570BD | 5.08:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #2570BD | 4.13:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #2570BD text on white | 5.08:1 | AA | Lc 74.7 | Content text, not long reading |
| #2570BD text on black | 4.13:1 | AA large text | Lc -27.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A4C4E9
oklch(80.9% 0.063 252.3)
-
Step 400
400
#72A4DE
oklch(70.7% 0.101 252.8)
-
Step 500
500
#4B8CD5
oklch(63% 0.129 252.9)
-
Step 600
600 (this color)
#2570BD
oklch(54% 0.14 252.6)
-
Step 700
700
#1D62A8
oklch(49.2% 0.13 252.6)
-
Step 800
800
#1B5088
oklch(42.7% 0.108 252.9)
-
Step 900
900
#1C436D
oklch(37.7% 0.085 252.5)
-
Step 950
950
#122740
oklch(26.9% 0.054 254)
#2570BD 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) | #4A76C0 | 0.038 |
| Deuteranopia (no green cones) | #3168BB | 0.022 |
| Tritanopia (no blue cones) | #00828D | 0.104 |
| Achromatopsia (no color) | #6E6E6E | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2570BD
#2570BD
oklch(54% 0.14 252.6)
- #976200
#976200
oklch(54% 0.115 72.5)
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 #2570BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- Windows Blue #3778BF ΔE 0.028
- French Blue #436BAD ΔE 0.033
- Nice Blue #107AB0 ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.039
- Muted Blue #3B719F ΔE 0.050
- Ocean Blue #03719C ΔE 0.056
- Dull Blue #49759C ΔE 0.063
Use #2570BD 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.