#037ABA
Closest named color: Nice Blue (#107AB0). oklch(55.6% 0.133 242.7), rgb(3, 122, 186).
Aa
White text reads best on this color (4.67:1).
About this color
#037ABA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.133 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.016 away. White text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.49:1 |
| White text | 4.67:1 |
Values
| HEX | #037ABA |
| RGB | rgb(3, 122, 186) |
| HSL | hsl(201, 97%, 37%) |
| OKLCH | oklch(55.6% 0.133 242.7) |
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 #037ABA | 4.67:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #037ABA | 4.49:1 | AA large text | Lc 32.3 | Non-text elements, placeholder text |
| #037ABA text on white | 4.67:1 | AA | Lc 71.8 | Content text, not long reading |
| #037ABA text on black | 4.49:1 | AA large text | Lc -29.9 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#A0C6E5
oklch(81% 0.06 243.2)
-
Step 400
400
#69A8D8
oklch(70.8% 0.096 242.6)
-
Step 500
500
#3A91CD
oklch(63.1% 0.122 242.5)
-
Step 600
600 (this color)
#037ABA
oklch(55.6% 0.133 242.7)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#015482
oklch(42.8% 0.102 242.6)
-
Step 900
900
#114668
oklch(37.8% 0.079 242.1)
-
Step 950
950
#0D293D
oklch(27% 0.05 242.9)
#037ABA 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) | #5B7CBD | 0.060 |
| Deuteranopia (no green cones) | #436DB9 | 0.045 |
| Tritanopia (no blue cones) | #008A91 | 0.090 |
| Achromatopsia (no color) | #747474 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #037ABA
#037ABA
oklch(55.6% 0.133 242.7)
- #A65F00
#A65F00
oklch(55.5% 0.127 62.5)
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 #037ABA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.016
- Windows Blue #3778BF ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.037
- Water Blue #0E87CC ΔE 0.043
- Mid Blue #276AB3 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.047
- Muted Blue #3B719F ΔE 0.047
- French Blue #436BAD ΔE 0.049
Use #037ABA 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.